Alright, I have a couple of very minor discoveries.
First of all, all trees allign to the grid as well as berry bushes. If you have a settlement that you want the AI to build on in a forest or something, then you could just fire the trigger with a tree.
Also, I found out annother cause for trigger lock. If you ever put quotes or slashes or anything thats unnalowed when renaming units into a play dialogue input field, it causes trigger lock. Just watch out.
Also, about placing single trees, like when I want to do a savanah instead of a dense forrest, where are they in the editor? I can never find them in place objects. Are they under their name that comes before the word tree?
SAVE THE WADJETS
I was on these forums before you were BORN!!!