Jerry, a few years ago we had our 2001 Contessa at Alliance Coach for a leaking jack issue.
After they worked on it for a couple of days they determined the left rear jack was leaking hyd fluid internally and had bad seals.
They I guess had activated the jacks several times. They said the jack(at that time) could not be repaired. Now I guess they can.
Two weeks after getting the Coach back I left on a trip and during a right turn the living room slide extended almost all the way out. I luckily pulled off the road and managed to retract the slide. i called Alliance Coach(it was a Saturday am) and they asked me to bring it in, two hours the opposite direction I was headed. They checked it out and they had never refilled the reservoir with fluid after dumping a bunch out three weeks earlier.
They filled the tank, ran the slide in and out to bleed the air and it was fine again. Needless to say we didn't get far on our trip the first day. That summer I drove the coach to HWH in Iowa and they removed the IDS system jacks, capped the lines, and installed an air leveling system from scratch. All custom wiring, a new console panel, a new air compressor, and set it all up in 2 1/2 days.
Now the only item that the hyd reservoir is for is the living room slide operation. It was costly but so glad We had it done. Now we have a very fast, and very clean leveling system that works in the blink of an eye.
Good luck getting yours repaired, but not sure Alliance can do it.