there is a program that will allow you to pull the app backups and associated data from your nandroid backup that you made in bootstrap. I forget what the name of it is, but do a little digging and you will find it. what isn't TiBu updating that you were expecting it to? I never use TiBu to restore anything but Apps and their data, between switching roms all the time and messing w/ other things restoring backups can go very wrong if you restore system info that was not made in that rom. I have never had any issues w/ TiBu restoring games and data, I was able to get all of my game data moved over from my OG DROID to the Bionic.