All of the recent versions of slicer to not listen to my request for number of solid top and bottom layers and number of perimeters. I want 3 solid layers top and bottom and 3 perimeters but it always does 2 for all. What's the deal? For now I'm sticking with 0.7.2b
Try setting it to 99 (or some high value), then back to the number you want. There is a bug with it ignoring small changes. I had the same issue and found this suggest after some serious googling.