My giveaway was deleted

Hello, I recently created a giveaway for defense grid:the awakening and DLC and it just recently ended. I added the winner on steam but when I went back to steamgifts less than 5 minutes after the giveaway had ended, it said the giveaway was deleted and I have no idea why. Here's what steamgifts said.

Reason: Selected Incorrect Game or Information
Notes: This giveaway was removed since incorrect information was provided, or the selected game did not match the gift. If we're missing a game, please contact support.

I dont believe I selected any wrong information in any way so if someone knows why it might have gotten deleted, please let me know. Thanks!