Right now (version 8.1) tabbing through the fields in the reference window seems to follow some internal order that is separate from the physical layout of the fields. Would it be possible to set the tabbing order to match the physical order? It's really crossing my mental wires the way it is right now.
Yes and no. Yes, it's possible. No, so much of the internal logic is based upon the index order that it would break lots of things and no doubt cause problems -- too many to make it worthwhile I'm afraid.