Polygons in wrong place after building airport scenery

When i make a polygon on the runway to cover some markings, the markings are hidden correctly in dev mode, but then once i build the airport, all the polygons are off by a bit making it impossible to correctly mark precisely. Any suggestions?

See that the while lines are supposed to be covered, but only are so once i load the asset library.

You can see that the concrete square is not straight, and the polygon to cover up a white line, does not properly cover the white line. But once I load the asset group, everything is loaded perfectly in place. I have tried cleaning, etc. but can’t figure out what’s going on.