Registry help needed

I just got the 1952 Bowman for my Campy set but it says that the card already exists in the inventory. I'm guessing that means that the seller (or someone else) has the card listed in their registry set. How do I go about proving that I have the card and getting it removed from the other registry (I just sent the seller a request to do this and haven't heard back from him/her yet)? And how long does it take? Thanks in advance for the help!
Chris
My small collection
Want List:
'61 Topps Roy Campanella in PSA 5-7
Cardinal T206 cards
Adam Wainwright GU Jersey
My small collection
Want List:
'61 Topps Roy Campanella in PSA 5-7
Cardinal T206 cards
Adam Wainwright GU Jersey
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Comments
My small collection
Want List:
'61 Topps Roy Campanella in PSA 5-7
Cardinal T206 cards
Adam Wainwright GU Jersey
Try and put it in agian some times in will go in after they take the card out of there set.