It's not stake's fault when you lose a bet. It is entirely your fault. Maybe it was a bug since you didn't get ban from violating their rules or something like but a request made by you to self-excluded ban. Gambling sites are like that, when you ask them to ban temporary or permanent is you cannot deposit or withdraw on their site but in your case is you are able to deposit and bet. My guess is as stated above that it is bug/issue or you aren't ban yet.