My Skin Went Outdated When I Went Into 14w06b

I was in 14w07a with my skin and I went to 14w06b to go on a multiplayer server. But my skin was the skin i had previously a few days ago. I also tried this in singleplayer and had the same effect. I went back on 14w07a and then my skin was correct. And so i tried reuploading my skin then going on the w06 server but still didnt work.