You could be doing the same thing I did when I first started using my HW27KS...I raised the roof about an inch too high, which left a gap over the door. Apparently, all the pop-up rookies do it.
Try lowering your roof a half inch or so at a time and see if that eliminates the gap...then make a mental note about how that slack wire looks the next you raise it, and you'll get it closer.