I have a 2001 model Allegro bus. I see they have not gotten any better at locating the filler spout. I would love to use both filler spouts for faster fillups, but alas on my rig, the fill spout on the drivers side is nearly useless. I quickly learned to pull into a truck stop. Go around to the drivers side and start the pump, lay the handle on the ground then go to the passenger side to fill the coach. At least according to your description, your working filler is on the side with the actual pump in a truck stop. I wish mine worked that way.
My wife and I would travel full time, but we have to sleep occasionally.
2001 Tiffin Allegro Bus 40 ft DP named the Wild Eagle
Followed by the Eaglet - A 2014 Jeep Grand Cherokee.