Some motorhome doors (including the one in our 2004 Brave) are vulnerable to flexing problems. In our case, the door often sticks when the rig is parked on a very uneven site. The folks at the dealer indicated that RV bodies actually flex slightly under various conditions. When this happens, it can impact the fit of your door.
If the duct tape trick doesn't work, try installing star washers before you adjust the latches again. I used this approach two years ago and have eliminated the problem in most cases. In our situation, the adjustments simply weren't holding over time. However, the star washers cured that problem.
Occasionally, when the rig is really uneven, the door will still stick. If the duct tape doesn't work, try a few profanities and a little silicone. Works for me. Best of luck.
2004 Winnebago Brave 34D with the usual add-ons