I understand.. Create global object with cache of creeps is bad idea...

Second example: creep move out from target, every tick distance increases. Why??

http://c2n.me/3LUlajV

http://c2n.me/3LUlcd3

I don't understand( My creeps move by map in chaos ways.. And often stucks..

I debug it, and I don't understand - creep have task:

this.creep.moveTo(constructionSite);

And creep don't move to it.. But coordinates of target correct (screenshot - there are target, creep say where he go, but he don't go.. He stuck near wall.. Why?

http://c2n.me/3LUl2Mc

After I refresh page by F5, creeps hides.

Room https://screeps.com/a/#!/room/W12S15

There are some phantom creeps: its visible, I can see its ID and names,. but I don't get link on that creeps from console. 

Example: