Has anyone had an issue with mates getting out of whack on assemblies. I mate a part in an assembly and everything looks good, re-open the assembly later and the mates have "moved". For instance a hole to hole mate between two parts now has the holes mated to different holes. Of I will have a plate with a chamfered edge. I mate another part a distance from the vertical face of the part and when I go back in the mate is now to the mated to the angled chamfer surface? I though maybe it had to do with using parts that had imported geometry, but even creating from scratch I am still seeing issues.