You shouldn't need 2-bath fixing or washing for RC.
How do you handle the prints in fixing and washing? Do you run them individually or in batches? What sort of washer do you use? How do you shuffle or agitate? Can you be certain that all parts of the paper remain submerged throughout each processing step? Spots of incomplete fixing or washing near the edges suggest that the paper may be curling upward with the edges poking through the surface of the solution.