I don't know if it's the same issue, but I had this happening to me before.
It turns out that I did not have 46 players active (due to injuries). If you have less than 46, the AI will rearrange your depth chart.
If one of the numbers at the top (under contract or active) is red, it means the AI will resolve it at the next game sim. At least, that's what I've seen mentioned on the boards.