I think it’s just on the Gold card. My others are showing correctly. But I think I saw it explained (on reddit -so grain of salt an all) that there’s a missing 0 from the $100 starting point of the calculation.
So what’s showing as available is $10 - whatever you’ve used rather than $100 - whatever you’ve used.
I think it’s just a website display issue.
I lied-my Hilton is also snowing funky. But same issue (missing a zero from the original starting number) and since it’s all jumbled up with digits written on top of each other, I’m more convinced it’s just a display issue.