Yep the goo gone was just needed on the very edges of where the stickers were. My guess was that that little bit of adhesive just didn't want to come up with the rest. But - it was exposed to the elements so who knows what little changes it went through.
Did you freak a little when you first saw the dirty little adhesive lines left? I did, because mine weren't so much along the stripes but more at the ends where they hit the gaps around the door (I had the body stripes not the hood stripes). I thought some fool had taken a razor blade and cut the stripes to length, now I know it was just adhesive, possibly more there than elsewhere if the stripes had shrunk a little.
Looks like you got it. Cool!