^ I was mistaken. It WAS my percentile that changed, not the score. I must have had a case of dyslexia earlier.
And thanks everyone for checking!
My score went from a 77% in quant to a 76% in quant. I took the GMAT in March of this year, so I wouldn't expect a change so soon, but your reasoning makes sense and I bet that is the case.
I called admissions and they instructed me to send an e-mail, which I have done. I'll post back when I get a response, but I bet they will reply back that the percentiles have changed since I took the test.
Anyways, I'm definitely not happy that my percentile
dropped! But hey, thank god my overall % stayed the same!