It doesn't register.

I recently purchased a 2011 W Proof 70 Ultra Cameo. I was able to place the coin in my competitive Silver Eagles Proof Category, however, even though the labeling shows it as a 25th anniversary coin, I can't get it to go into the competitive coin slot for the 25th Anniversary catergory. I have but of collectin for a while. Is there something I am missing. The coin does validate for NGC Authenticity. HELP! and thanks.

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