If you look at the page, you'll see 5 different cert numbers for this card, meaning there's at least 5 of them.
https://www.psacard.com/auctionprice...ues/360704#g=8
Click on the Pop report and you'll see there are 13 rated PSA 8 and 2 at PSA 9.
Addition: Yes, there are swings in the prices of individual cards, and not all PSA 8's are worth the same. Centering on a PSA can vary up to like 65/35 on the front (one border twice as large as the other side) and 90/10 on the back (9 times larger on one side than the other). Cards with better centering and eye appeal have been selling for a premium in the previous years than those with worse centering or print defects.