Someone purchased Recettear: An Item Shop's Tale for 3 case keys from my shop. I can see the keys in my inventory, but withdrawing them is impossible. This happened 2 days ago. I provided a screenshot of the transaction below. I received other case keys afterwards which I'm able to withdraw. Thank you for any help.

http://imgur.com/wAiaAOZ

EDIT:

Read a comment from Joto on how to make items reappear by adding items from the same category to the bot.