Unit randomly being displaced

[Champ-Bear]

So I have this unit in my map. It's actually a wisp, but with added invunerability/locust, and then I changed the model to look like a doodad. It's for a secret area, so people can walk over it, but it looks just like a normal doodad. Anyways, it's in the place I want it in WE, but whenever I go to try out my map it randomly shifts down and to the left. I tried to adjust it, but it just seems to randomly shift around when I load up the map. Anyone happen to know why? There is a region right under where the unit is, which I thought might be the reason, but I don't see why it would.

 

[ManyTimes]

Remove the unit, see if there is any triggers dealing with it, then a message would pop up "this units is being used by a trigger" (kinda)...
If not, change movement type of the "wisp" to fly and change collision size to 0, both fields is in the object editor on the wisp unit. Is it owned by anyone? Does it have the wander ability?

 

[Champ-Bear]

Changed it to fly and collision size to 0 and one of them worked... thanks.