You shouldn't see much glue if the joints are tight. But there's such a thing as too tight where the joint is starved of glue. Also, the tall bottom rail on these types of doors are not glued for the entire length of the joint because there's too much seasonal movement in a 10" wide board. Most of the glue is near the bottom, which is why you void the warranty if you trim the bottom by more than 1/2".
I'd be surprised if the repair holds for long, because the new glue isn't going to stick well to the old glue.