That would be quite hard to get a leg over, does it fold back at the base to make a day bed?

I have the factory Classic dual seat with backrest on my 2010 R3R set at maximum height and it is possible to leg over without folding, but easier if you just fold the pad backwards on the top pad mount hinge like a 'T'.
The sprung bottom main adjustment mount folds fold forwards and I presume is really there to allow the pillion to get on (if a sissy bar is fitted), while the rider stands holding the bike up. I don't usually carry pillions so haven't tried it yet.
Have you a picture of the rear mount to the pad and how doe s yours fold - at one point or two and forwards or back?
What is the seat model, is that std factory 2013 R3R or recovered/shaped? Found on your profile -
"BeyondTrim custom seats".
I presume the Utopia backrest mount bolts on top of or replaces the existing pillion base mount.
I have a generic pad from the local dealer made with fitted thread inserts for mounting that I had tried on some home made flimsy mounts that worked OK before buying the factory classic seat and backrest.