So, I didn't really but in the notifications area, it is listed twice. That is, I got the calculus badge a few weeks ago with exactly 100 total score in calculus. Then, a user was removed and I lost 10 reputation and my calculus score went to 99. I still had the calculus badge, which is correct based on my understanding. Then, yesterday, I answered another calculus question and got up to 101 and I was again notified that I earned the calculus badge.
Any way, this seems like a bug, though not exactly a big deal. Just thought I'd bring it up.