I don't know what's about that comma in the address, but it's strange and may be the key to your problem. Is that withdraw address at a service provider (online wallet, exchange)? Can that ending part be a payment ID?
You should indeed try to find out more about that comma. I think that there is a chance that your actual address is the part from before the comma.
Maybe you should ask
in the Monero thread, since the ones there could know much more.
For me it doesn't look like a hack. Instead a possible feature removed at that mining site or even in Monero.