Can you hit before splitting a 2nd time in Blackjack??

[LAx12]

I was playing Blackjack on NitrogenSports. I got 8,8. Pretty much under every circumstance you are suppose to split 8s, so I did.

I got dealt 8,3 and 8,8 again.

I hit the 8,3 and got 21. I wanted to split the 2nd 8,8 but they forced me to hit or stand.

The site rules say they allow up to 3 Splits.

Did NitrogenSports cheat me again?

I attached a photo showing they didnt allow me to split