Yes, 100% correct. Backups 1,2,3 & 4 all show perfect on the home menu.
Yes, I even deleted game 4 and re-installed, no problem. Its like some index got messed up past 4. I can also install to NAND or USB, just nothing past the 4th game.
The USB is a thumb drive, 64GB. No Y cable.
I've used...