On Friday I took my new Seneca to fill up the propane. It had just under a half tank. I watched the attendant put 12.2 gallons in the tank. My gauge is upside down on my rv, but it registered full. I took it back home and put it in the garage. On Saturday I happened to look at the gauge, and it was on 1/4 tank. Nothing had been on, and I didn't smell gas. I can't imagine what happened. It was close to full when I picked the unit up from the dealer. I did use the heater over the last two weeks some and the propane useage seemed normal as compared to my last Jayco Greyhawk 31ss. I checked the gauge again yesterday (Sunday), and it was still on 1/4 tank. If there is a leak, shouldn't the rest leak out? Can the gauge be defective? I was thinking about going to refill the tank to see if it is still full. But if it isn't, then I don't want to fill it back up just to leak back out. Any one else had this problem?