Gameplay: bad Zz'rot pathfinding

Can I include a picture? Is this something I can do? I'm gonna try :D

Basically, Zz'rot portal put up in the lower jungle, near blue double golems, and, instead of the voidlings walking to the nearby bot tower, they instead walked all the way up to mid lane--much further away! http://i1139.photobucket.com/albums/n545/Crassadon/zzbad01.png Nice, that totally worked!

Did the voidling at least reach the mid lane tower?

http://i1139.photobucket.com/albums/n545/Crassadon/zzbad02.png

No! :D

How does the portal determine where to direct it's forces? If it's straight line distance to the nearest tower, then bot lane was much closer; that tower was on the same screen as the portal itself! Perhaps all portals in the jungle direct their forces to mid lane then? I hope this is improved, becausethey'll just die if the portal isn't right near mid lane!

Incidentally, I had drawn out double golems, and some lane minions were fighting me at the same time in the jungle, and the portal voidlings first helped out fighting those monsters, so maybe that affected their AI?

Good luck getting better Zz'rot pathfinding!