They don't update it because they don't want to.
I don't think so, and even if they wanted to keep everything perfect it would be impossible to make everyone happy in crazy world we live today, including kyc regulations.
They probably have financial benefit and percentage earning from listing all exchanges on their website, but they said in public that they can't guarantee anything, so there is always a risk using this exchanges.
I think you still have a chance to provide some documents (one way or another) and send them to this exchange, yes I know this sucks.