Symmetric items not changing together

[traisjames]

While in flight I made some changes to some parachutes, but it only changed one of the chutes.  Both chutes were installed symmetrically.  This isn't the first time, I have had trouble in the past...trying to adjust one item, and it sometimes not being synced with its clones.

[Cavscout74]

In flight, it only changes the part you click on.  Only in the editor do all symmetrical parts change