Yup I just figured that out .. I can't believe that sony had screwed this one so badly like this , I have been always a sony fan and I hope they fix this on the next handheld platform .
Anyway , we will have to stick to my account on the vita and I'll play from it the games I want and he will play on the remote play some of the Plus inde games with remote play from the PS4 AFTER WE FORMAT THE VITA EVERY SINGLE TIME WE WANT TO SWITCH USERS . this is so frustrating .
He won't be able to play on his account then , Why would he care so much about playing on his account ?? Trophies