This is the link to my auction. It ended today and if you look, you can see I sold some horses. But if you look in my barn, the purchased horses are in my barn (the sales pasture). Also in the email I got from the game it said I sold zero horses. Not sure if I got any money even for the set free ones. I have a screenshot but can't figure out how to post it. Thanks!

Its because the bidders didnt have room for your horses.

Sweet, thanks! Never had that happen before lol.