My first thought was a seal had not been properly seated during re-assembly. I crushed one when I rebuilt an old Mazda tranny & had to re-use the originals. Partial fluid bypass will prevent proper pressure buildup in different parts of the tranny - depending on which seal is damaged.
A broken/cracked seal might give similar symptoms, but I think that Roadrunner is on the right track - especially since they seem to feel the pressures are correct. While they're in there checking the valves, they can look for some crushed/broken/cracked seals.
I'm sad your Tour is not quite right yet, I know what a bummer that is. But at least you know what a great driving car you'll have after they're done.
Keep us updated. This has been an interesting intellectual exercise for me.
