In post ads showing up in post previews on home page!

I have the in post ads through you and I had to deactivate it beacuse it was showing up on every single post preview on my home page. I changed all the settings, do not show on snippets, I even set it to only show on the last paragraph thinking if I moved it down it would help, nada. I deactivated it for the sake of the front page but I have an ad spot someone purchased and need to find out how to get it going again. Any custom CSS so that I can reactivate it and get this ad going? Thanks!