Since you ran into a problem, you might have had a glitch in the KYC system that caused you to be mistakenly caught by the casino. Although I am glad to hear that you have solved this problem now, but you must read the pledges carefully before submitting the KYC so that you don't make a mistake. Although I think submission of KYC only due to user error is a problem, but if you had given your KYC properly then it wouldn't have been a problem. Since your error has been caught by the casino, and it has been resolved by now, it is good for you that you submit carefully when doing KYC at other casinos in the future. Since you have found the solution in this casino, right now you can undoubtedly play here, and you can continue.
There’s no such thing as mistakenly ask for KYC because they have a reference and standard process to detect user that needs to do KYC. All users can be asked to undergo KYC on random basis without any further explanation from the casino but most of the time it’s because of how we play in the casino.
KYC is for AML purposes so there’s no way a casino will ask for it due to an error only so there’s something on that user account that makes the casino suspicious to him. It seems he is innocent based on his own statement but we don’t what he really doing on his shuffle account that cause the KYC trigger on him.