I don't think they actually changed your window times, as that is obviously not possible. They probably just adjusted the times so that the RR would be accepted in Carmen. I had to have the hours of a day off adjusted because I needed 10 hours of rest prior to a day off (yes, its confusing, but thats exactly what happened).

Its not that RR is prohibited by the contract for a LC pilot, it is just not mentioned. When the new contract was written, they forgot to change the wording on RR concerning what times you can sit ready. I'm surprised they haven't fixed this yet, as it seems it would just be a simple rewrite and/or LOA.