Similar thing happened on my Winnebago Vista, the track screws pulled out of the ceiling after about 30 days of use, the trigger for me was the strap holding the door in fixed location for travel broke and the door was moving back and forth during travel putting extra stress on everything before I discovered the situation. I repaired the track mounting problem by going up one size on all the screws using the same holes, bought same length and type screws, just bigger around. Think I had to use a drill to enlarge the track holes to accomodate the larger screw size. You may have to drill new holes you likely made my fix un-usable if you enlarged the holes trying to use moly bolts.
The one size larger screws with the same spacing has held for 5 months now, so far so good.
Randy - Manhattan, Kansas
2015 Vista 27N
2016 Honda HR-V