rear window opening question

As I was test fitting the upper window trim I noticed a "bulge" along the runner as it goes down into the quarter area.Both sides have it but the driver side is bigger.Also the top had been replaced before I bought it but not completed as the front and back glass was still out(this was done by a shop for two owners before me).Is this normal or will I have to do surgery,final paint is on so any suggestions would be great.