Im thinking the new skin fits a little lose because the seat foam has been broken down a little bit :shrug:
I think it looks great, did you have new hog rings and use the appropriate pliers?
I also have some skins just incase.
I reused the old rings.. OMG what a pita!!! but I used pliers and made them tight again. The inside of the seat was in good condition. I just think it fits a little weird because I used the passenger side skin.