the best -and correct- weatherstrip comes from Steele Rubber Products, you might ask Classic who makes theirs, if it's "SoffSeal", that's your problem .... also, as 46 suggests, make sure the door is actually latching all the way, the door side of the latch does have a 2 stage action

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics