I just remembered another odd bug involving groups: sometimes, changing the name of a group will also change its position!
I'm not sure exactly how to recreate it, as it doesn't happen with every group, but it may have to do with using a custom center. Consider the attached file—there are four piston rods that are groups, and if you change their names, the pos values in the matrix will also change. It's just by a few thousandths, but clearly not expected behavior…and for those of us with a perfectionist nature… ;-)
A successful workaround is to change the group name in a text editor, so it probably has to do with the actual dialog in LDCad.
(You'll have some missing submodels that I didn't bother to inline, but that won't affect anything.)
I'm not sure exactly how to recreate it, as it doesn't happen with every group, but it may have to do with using a custom center. Consider the attached file—there are four piston rods that are groups, and if you change their names, the pos values in the matrix will also change. It's just by a few thousandths, but clearly not expected behavior…and for those of us with a perfectionist nature… ;-)
A successful workaround is to change the group name in a text editor, so it probably has to do with the actual dialog in LDCad.
(You'll have some missing submodels that I didn't bother to inline, but that won't affect anything.)