The 8390 does have a center entrance door, but you will need to clarify if you are talking about that door or an interior door. I've had issues with both, especially when I used the
"auto" level function.
My bedroom door was, often times, difficult to open or close. Other times it was the entrance door that gave me grief.
I have now begun to use a dual direction bubble level set on the floor in the middle of the coach. I then level the coach manually. Since using the bubble level, I've had no problems.
As a double check, I allow the toilet door, shower door, medicine cabinet door and bedroom door to swing freely and see which direction the fall. Since they are all near the center of the coach, when they stay put, I know I'm level.
I know...It's old school...but it works best for me!