I have seen with many part files over the years, that certain hidden surface offset features re-appear when  we rebuild or edit other features.  These are simply surface offsets within the parts, not external references or anything like that.

This is annoying, even when rehiding the surfaces at each next feature, rolling back, ctrl-Q etc always brings that one surface back.  And of course it is not all parts, and no real rhyme or reason, or difference of part building methodology or any thing like that can be tracked to the surface.

We are currently on SW2010 SP4 x64 W7, but have seen this at all levels and all builds for the last couple of years.  I had submitted this to the VAR way back but nothing has ever come of it.

I can of course just delete them (Delete body), but do not want to do that

Thoughts as to why?