Originally Posted by
Barreveler
Several things are possible.
1. You're a gnome, the 10 engineering skill boost circumvented the bug.
2. You do in fact have only 7/8 total tinkers, but the one you're missing isn't important to your class so you didn't realize it.
It may also be possible that it was circumventing it if you made lots of extra items before you hit 525, but I don't think that's the case. The bug appeared to be that you didn't have a chance to learn a new tinker unless you got or had the potential to get a skill up from the craft, and no one learned more than 7/8 of the Cataclysm tinkers. Virtually every engineer I knew was at 7/8 of the cataclysm tinkers, gnomes excepted.