Problem with anti cheat trigger

Hi, im makeing a line tower war map but am having problem with the anti cheat creep that walks threw the lanes and attacks a building if he gets stuck/cant move anymore.

my problem is he will walk about halfway down the lane then turn around go back to the top and then first walk down to the bottom. but he will only attack buildings that are in the top half of the lane.

ive tried creating another regeon at the point where he turns around that will issue him a order to the point where he is suppose to go but still he turns around >.>.

there is completly no reson for this considering there is no command that i give for this action.

any people have the same problem or can give a solution?

Increase all the creep distance and times in the Gameplay Constants, and use the action "Player - Ignore Unit Guard Positions" (or something like that).