Is the '22 Cornerstone a Gen 1 or Gen 3 Valor system? We've had both with the Spartan chassis on our '17 Essex (Gen 1) and '23 Essex (Gen 3). I'm not sure when Spartan switched over, plus there's also the additional change to the Valid dash which is a HUGE help, happened with Newmar for the '23 model year.
If it's still Gen 1 all is not lost. Yes, it can be frustrating, but it's not crap. There were some issues way back with antenna locations, etc but I think those installation issues should have been solved by '22. There are issues with Gen 1 battery life, but that shouldn't be an issue on a '22 coach. I had a Valor Smart Tool and could program the Gen 1 system myself. There are a number of training presentations and videos out there on-line to guide you through the process. I could reset my sensors in as little as 3 minutes, or as long as 2 hours ... depended how many fat finger errors I made! The OP said he put the same sensors on his towed vehicle, does he mean that he installed Gen 1 coach sensors, or towed vehicle sensors ... they have different pressure ranges?
The Gen 3 system is an attempt to take lessons learned from the earlier units and address battery life as well as signal reliability, etc. I was always a fan of the Gen 1 system, the Gen 3 set-up with a Valid dash just blew me away! I can set up, and recall, multiple towed vehicle configurations, all from the Valid driver's dash display. I just changed towed vehicles, once I had the tires removed to install the sensors (that's still frustrating!) setting up the new ones were a 2 minute exercise ... it helped having the sensor SNs and locations at hand, but Valid also gives you a process if they're not.)
I would suggest the OP call Valor (now SpartanLync Technologies) for help. They used to have a guy called Don Rigby who would go around helping people get set up, he's also the author of a lot of the material you see on-line. Don retired and things fell into disarray, but they've brought him back out of retirement ... I spoke to him the other day. He's not out and about as he was full time, but he can get resources to help out customers. Don can be reached on (248) 392-1296 or
rigby.don@gmail.com