Ok, so Im trying to bench a few players, and change some positions like I have done in the past, but it keeps telling me I have too many players on the roster. I didnt pick up any new guys, and I have dropped 2 so far, but it still says that. I now have a couple less than others in my league. I now have a few empty slots on my roster and it wont let me change anyone around. Its error #160. Whats the deal?

Please help