Not sure exactly what location you are referring to? If you are talking about the following location (seen during mock up) as shown below, then you are correct about the piece being molded a little off. Most of the trucks I've seen are like this to some degree. There was a LOT of sanding and trimming required to just get this close. The door and hood gaps are decent after working them. This is the only real problem area - but I can live with it.
My dad and I have been building street rods and custom trucks for the last 30 years. These fenders were some of the worst pieces of fiberglass I've ever seen someone ask money for. If you are used to working with good quality street rod/machine fiberglass, you will be disappointed in these. If I had it to do over I would choose another vendor's product. YMMV.