How thick is the sew foam? If it's only 1/4" thick, you only need to sew around the border once. That is some very pliable vinyl, is it not? Remember, this is going to be stretched onto the seat frame, so almost all of those wrinkles will just come out when you stretch it, especially the rear seat back. Also, just put glue on either the vinyl or the sew foam, not on both.
No one lives forever, the trick is creating something that will.