Theme week is a long running group challenge. It is in place so that we promote our art, our group, and the artists. Please make sure that you are following rule #5
It doesn't have to be the exact wording, but it needs to be close.
5) Please paste the following statement (or equivalent) in your listing description to promote theme week ACEO's. *Failure to do so may disqualify your entry.*
“ This is an entry in the Theme Week contest from the ACEO ~ Art Cards Editions and Originals group here on eBay. The contest takes place the first week of each month. To view other listings, please search ACEO TW in the ebay search bar“