Recreational Vehicle Lpg Tank Valve/gauge problems of the 2018 Subaru Legacy

On June 6, 2019, we took our car in for regular maintenance and to perform two outstanding recalls that involved "software reprogramming" -- one for the fuel gauge (which apparently may not properly reflect low gas levels) and one for the head unit (which may fail to initialize and activate the backup camera). We had _zero_ problems with the head unit (or fuel gauge to our knowledge) prior to the recall work. Now the head unit fails to initialize for several minutes every few times we start our car -- the _exact_ issue that the recall was initiated to address. I am also concerned that the fuel gauge reprogramming may not have remedied that sensing error either. I contacted the manufacturer, which has instructed us to return to the same dealer to have them try to fix it again. We scheduled their next available appointment on July 3rd, but now have no confidence that the software reprogramming rolled out by Subaru actually remedied the manufacturing defects. Indeed, it appears to have introduced a defect into our head unit system.

The safety recall regarding fuel has been completed. I filled the gas tank with the gauge on half. I put 12 gallons in the 16 gallon tank. Yesterday I repeated this by again filling the tank with the gauge reading half. I put 11. 4 gallons in the 16 gallon tank. I also noted that the mpg calculator is now only using the data since the recall. Tire pressure would not register. I am not sure if there are any other systems affected by this recall. I feel that they vehicle is unreliable.

I took the car to the dealer for the recall on the fuel gauge. Supposedly the work was done. The website lists it as incomplete. I don't know what this means or what I should do about it. Please advise.