OK, my partner suggested I hook it up to the computer and check it out. Well I discovered I have 4 screens of apps, then an empty screen, then a screen with the missing gadgets in a folder! I guess I never scroll past that empty screen and didn't notice the dots that tell me which screen I'm on. No idea how that got there, maybe I didn't turn it off when I stuck it in my pocket and it pressed on the screen. Anyway mystery solved!