Bizarre Monster Book Error

I don't think picking up the new cards messes up your monster book at all. My Skelegon cards say I have 1 even though I have them maxed, but when I found yet another Skelosaurus monster card yesterday it deleted itself because I apparently already have them maxed. Meaning the game knows that I still have maxed Skele cards, but the monster book is simply showing me the wrong information.

But this isn't true. I've had five Pap cards for ages. When I Papped the day of the patch and got a Pap card, it actually added it to my book. That's what made me notice all of this in the first place.

If it knew I already had max Paps, it wouldn't have allowed that one to be added. That's what you're saying, right?