[68JOHNDEERE]

On these doors the metal track attached to the bottom of the glass is designed to roll up in between those belt lines that are sticking up in your picture.
What I have seen in the past is when replacing these belt lines the metal shell of the door where these parts attach get distorted, and when new parts are installed they stick out and the belt line then catches on the metal track attached to the glass when you roll the door glass up.

Remedy: roll the door glass all the way down into the door and try to spread the lower edges of the belt lines apart from each other so the track can enter between the belt lines when you roll the door glass back up.