This is not a bug in ChamSys, and not a bug in Capture.
Both softwares have their own library and there is no link between these two.
MagicQ gets from Capture: fixture brand, fixture name, DMX Chans. With this info it tries to match the data to a fixture in MagicQ. If it is the wrong one, you can still morph.
In the head file of ChamSys you can add extra info so that a better match is done next time.