Tom,
That is definately the wrong weather strip for your door for sure !...shape does not come close to what you should have .
the dimensions you should have are 3/4 X 5/8,
I added a few pics of the correct profile to my photobucket account ...check them out for what you SHOULD HAVE.
I would say that your problem is in teh weatherstrip itself for sure.
Tim


http://s260.photobucket.com/albums/ii15/SW_Radial/


1952 Chevy Shortbed

Photos in Photobucket

If It Aint Broke Fix It Till It Is!