Even version 1 G70 stored transpose....I don't recall any Roland user programs that didn't save transpose.
Well, since you are the resident G-70 guru, it wasn't transpose that the UPG's didn't store...I can't be bothered searching the Roland arranger site (or SZ) for any details on what the problem was, so we may as well leave it at that...I do know it was something relatively important regarding UPG's that required a workaround, and it was also posted here by Diki to help a G-70 user.
Maybe I'll have a look when I have a bit more free time.
Ian