Battlecraft screwing up a map

[Crash42modder]

So, here goes. Im building a map and have made changes, saved it, made changes, saved it. The usual process over time. Anyway, Now Ive got the map to the point that, Battlecraft (2.1) screws the map up no matter what I do. I make a slight change, save it. Close Battlecraft, re open the map but Battlecraft completely changes the terrain, and lowers all static objects and vehicles to the point that you cant see them. Anyone notice that and figured out how to fix it?