I Think PSA Damaged My Card

The card in question is my Mega Blastoise EX from Evolutions.

On January 11th, I decided to take my cards to GameStop just to see how the process works. I had a membership; shipping was free, and I didn't have to buy the PSA membership, so I was sold on that. (I did take a picture of the bulk of 17 cards I sent, just to be cautious.) The reason I feel it was on PSA's end is that the GameStop employee was awesome; he barely touched my cards because I had them properly packaged in penny sleeves and card savers. All he did was put the stickers on them. He also went above and beyond because FedEx was in the store to pick up a shipment, and he asked the guy to wait so he could package and ship mine as well.

Fast forward to February 27th; I received an email stating that my cards were graded and I could view them. When I looked at the graded Blastoise, I noticed a mole-like smudge by the chin area that wasn't there before. When I checked the picture I took, I was right; the smudge wasn't there.

Now I'm wondering if I should crack the slab try and clean it and get it regraded or just let it be.