The Brassavola might be getting too much light. The reddish/purple is sometimes OK as long as it is getting enough water, but you also said that they are wrinkled, that is not good. That is too much sun and not enough water. DO the leaves get really hot to the touch where you have it? If so, you need to back it out of that spot. The red/purple color will eventually fade back to green, but the wrinkles are there now. Brassavolas like to dry out a bit in between waterings, but your's sounds like it's drying too much and getting too much sun.
I have a Brassavola cordata and it too has reddish/purple leaves, but no wrinkling. I have been backing it out of the really bright spot in my orchid enclosure and the leaves are starting to go green again. Also, it is putting up new leaves and roots like crazy. So I must be doing something right with this one.
Good luck with your Brassa!