Hmmm, I've never had a problem with my Commander.
I've had a problem with the sliding door on my Mini-Van, but that was because of the gunk that would accumulate from the drink and snakes the kids would spill.
And gunk on the seal or door jamb can cause them to freeze together in freezing weather. So scrubbing the seal and door jamb area, in some cases can cure the door freezing shut in cold weather.
At the same time, my Neon R/T had the door freeze shut all the time and nothing I did could fix it.
So, sometimes, it just seems some doors are more prone to freeze shut regardless of the design.