Is this the Goofy Gas Gauge (12 V issue), or something else?

It's the reset of the distance that is of interest to me because when that happens that's messing with your gas gauge or your mileage somewhat also this is a generation 2 I don't know how long you've had it I know that when I first got one of mine I had the same 8 and 1/2 gallon situation it's an 11 gallon car and I run the thing down until it's flashing and then go 30 miles to try and get pretty much everything out of the tank if you will and then when I go to the station when I first got the car I started filling it up till it burps the gas jumps out at me then from that point I feel it real slow until I get like 10 and 1/2 10.9 whatever gallons in it so when I turn off the pump I can still see the fuel in l in the filler neck. That's right at 10.8 10.9 gallons Cap it off and go and I've been filling it like that since I got the car now I can pull up to the pump in sheets drop the blue fuel in on top click It shuts off at about 8.8 gallons and then I fill it at about half squeeze right up to about 10.8 10.9. so basically I've stretched that bladder back out I believe everybody tries to keep these things barely full and wait until they're all the time completely empty to fill up so on and so forth so the bladder is not getting or staying stretched I cycle through a tank of gas so quickly and then fill it right back up immediately stretching that bladder all the way as far as I can and it seems to have made a difference now I can feel it a lot faster and get it right up to the 10.8 alongside of a BMW or whatever not having to nurse in 8.5 gallons and then seemingly can't get any more in now I can get close to the 11.1 that's rated for.

 

might be a bladder issue