Same thing happened to me a couple of weeks ago. I contacted my affiliate MGR and he said it was just incorrect wording and that he would forward it to the technical department. Obviously, it hasn't been fixed yet
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The good news is that if you just continue the process with Quick Cash you should get proper credit (at least I did) and I had my affiliate MGR check to make sure.
If the player wasn't tracked to you, you would have gotten a different message.
Jason