If the parts were placed with symmetry then they will always map with symmetry also, regardless of it being off when trying to edit it's profile.
I think the parts placement (if you've seen a little blue highlighted area) when you place control surfaces means it will auto link those parts

Originally posted by Lythandros:

If the parts were placed with symmetry then they will always map with symmetry also, regardless of it being off when trying to edit it's profile.
I think the parts placement (if you've seen a little blue highlighted area) when you place control surfaces means it will auto link those parts

Thank you for the information. Is there a way to unlink parts? I guess I can just place control surfaces with symmetry off

This is a well know bug - It can be cured whenever it happens though, simply by right-clicking the part on the side that moves wrong and switching the corresponding input's slider all the way to the other side.

It'll be fixed eventually - Either once we find out exactly why it happens, or when we get around doing a new round of upgrades to that bit of UI.