When I place a box, double or single up against foundrys wall and then save and quit the box will be on a slight slant, is there anyway to stop this or reduce it?
I'm not sure, it's never happened to me. Maybe the yellow slanted part down in the bottom of the walls are messing up the boxes. I haven't seen it on any of my maps, though, so I couldn't give you a definite answer.
Happened to me with walls against boxes. Fixed it by interlocking a single box with the box. You could interlock it with the wall, that may help.