actionscript 3 - Adobe Flash CS6 AS3: KeyUp Handler triggers immediately after KeyDown Handler -

so in code attempting make had 2 players, each player had own key down , key handlers, labelled in attached code, , in handle movement, player 1 has wsad , player 2 uses left, right, , down keys, however, when ever press relative key down handler, fires key handler straight after, , not know why, here code, if great! :)

import flash.display.movieclip; import flash.events.event; import flash.events.mouseevent; import flash.events.keyboardevent; import flash.ui.keyboard;  public class main extends movieclip{      var playeroneleft:boolean = new boolean(false);     var playeroneright:boolean = new boolean(false);     var playeroneup:boolean = new boolean(false);     var playeronedown:boolean = new boolean(false);      var playertwoleft:boolean = new boolean(false);     var playertworight:boolean = new boolean(false);     var playertwoup:boolean = new boolean(false);     var playertwodown:boolean = new boolean(false);      var playerspeed:int = 5;      var gamepage:gamepage;      public function main(){         gamepage = new gamepage();         addchild(gamepage);         addallplayerhandlers();     }      public function playeronekeydownhandler(event:keyboardevent){         if(event.keycode == keyboard.a){             playeroneleft = true;             trace("a");         }         else if(event.keycode == keyboard.d){             playeroneright = true;             trace("d");         }         else if(event.keycode == keyboard.w){             playeroneup = true;             trace("w");         }         else if(event.keycode == keyboard.s){             playeronedown = true;             trace("s");         }     }      public function playeronekeyuphandler(event:keyboardevent){         if(event.keycode == keyboard.a){             playeroneleft = false;             trace("a");         }         else if(event.keycode == keyboard.d){             playeroneright = false;             trace("d");         }         else if(event.keycode == keyboard.w){             playeroneup = false;             trace("w");         }         else if(event.keycode == keyboard.s){             playeronedown = false;             trace("s");         }     }      public function playertwokeydownhandler(event:keyboardevent){         if(event.keycode == keyboard.left){             playertwoleft = true;             trace("left");         }         else if(event.keycode == keyboard.right){             playertworight = true;             trace("right");         }         else if(event.keycode == keyboard.up){             playertwoup = true;             trace("up");         }         else if(event.keycode == keyboard.down){             playertwodown = true;             trace("down");         }     }      public function playertwokeyuphandler(event:keyboardevent){         if(event.keycode == keyboard.left){             playertwoleft = false;             trace("left");         }         else if(event.keycode == keyboard.right){             playertworight = false;             trace("right");         }         else if(event.keycode == keyboard.up){             playertwoup = false;             trace("up");         }         else if(event.keycode == keyboard.down){             playertwodown = false;             trace("down");         }     }      public function playermovementhandler(event:event):void{         if(playeroneleft){             gamepage.playerone.x -= playerspeed;         }         else if(playeroneright){             gamepage.playerone.x += playerspeed;         }         else if(playeroneup){             gamepage.playerone.y += playerspeed;         }         else if(playeronedown){             gamepage.playerone.y -= playerspeed;         }          if(playertwoleft){             gamepage.playertwo.x -= playerspeed;         }         else if(playertworight){             gamepage.playertwo.x += playerspeed;         }         else if(playertwoup){             gamepage.playertwo.y += playerspeed;         }         else if(playertwodown){             gamepage.playertwo.y -= playerspeed;         }     }      public function playeronecollision(event:event):void{         if(gamepage.playerone.hittestobject(gamepage.leftwall)){             gamepage.playerone.x += playerspeed;         }         if(gamepage.playerone.hittestobject(gamepage.rightwall)){             gamepage.playerone.x -= playerspeed;         }         if(gamepage.playerone.hittestobject(gamepage.topwall)){             gamepage.playerone.y -= playerspeed;         }         if(gamepage.playerone.hittestobject(gamepage.bottomwall)){             gamepage.playerone.y += playerspeed;         }         if(gamepage.playerone.hittestobject(gamepage.middlewall)){             gamepage.playerone.x -= playerspeed;         }     }      public function playertwocollision(event:event):void{         if(gamepage.playertwo.hittestobject(gamepage.leftwall)){             gamepage.playertwo.x += playerspeed;         }         if(gamepage.playertwo.hittestobject(gamepage.rightwall)){             gamepage.playertwo.x -= playerspeed;         }         if(gamepage.playertwo.hittestobject(gamepage.topwall)){             gamepage.playertwo.y -= playerspeed;         }         if(gamepage.playertwo.hittestobject(gamepage.bottomwall)){             gamepage.playertwo.y += playerspeed;         }         if(gamepage.playertwo.hittestobject(gamepage.middlewall)){             gamepage.playertwo.x += playerspeed;         }     }      public function addplayermovementhandler(){         stage.addeventlistener(event.enter_frame,playermovementhandler);     }      public function addplayerkeyhandlers(){         stage.addeventlistener(keyboardevent.key_down,playeronekeydownhandler);         stage.addeventlistener(keyboardevent.key_down,playeronekeyuphandler);         stage.addeventlistener(keyboardevent.key_up,playertwokeydownhandler);         stage.addeventlistener(keyboardevent.key_up,playertwokeyuphandler);     }      public function addplayercollisionhandlers(){         gamepage.playerone.addeventlistener(event.enter_frame,playeronecollision);         gamepage.playertwo.addeventlistener(event.enter_frame,playertwocollision);     }      public function addallplayerhandlers(){         addplayerkeyhandlers();         addplayercollisionhandlers();         addplayermovementhandler();     } } 

when ever press relative key down handler, fires key handler straight after

this because registered them as

stage.addeventlistener(keyboardevent.key_down,playeronekeydownhandler); stage.addeventlistener(keyboardevent.key_down,playeronekeyuphandler); // type key_down, handler "up" stage.addeventlistener(keyboardevent.key_up,playertwokeydownhandler); //that looks suspicious, stage.addeventlistener(keyboardevent.key_up,playertwokeyuphandler); 

the lesson should learn copy & paste approach writing code bad practice. should not repeat yourself. duplicated code leads problems 1 @ hand.