Free monthly listings being used up?!

Im a relatively new seller of sports/pokemon cards. I typically only list within my 250 free listings as currently my cards are cheaper and on the lower end. These last two months i have noticed my free listings being used without me actually listing anything or relisting anything. I have almost my entire shop as "buy it now" with maybe 10 actions i just started this month. I listed 55 items a few days ago (Including those auctions) the other 250 items have been buy it now for months. So i listed 55 items but now im 123/250 free listings?? i cant figure out what is sucking/using up these listings. The only weird thing i noticed is that on my ebay page it shows even the buy it now cards as having a "Time Left" ranging from 28 days to 1 day ...which is weird since they arnt actions? Thanks all!!