YJ Gas gauge

So my gas gauge won't go below 1/2 anymore and it's been like that for a couple years.

My research told me it was a warped splash shield in the tank and not to worry about it until I'm pulling the tank anyway.

However, I realized something that I'd never thought enough to ask about during my diagnosing.

When I turn my YJ off, the gas gauge stays where it is while the other gauges go dead. That's normal right?

It's not like a just have a sticky gauge or anything, right?

Hmmmm,,Geoff,What happens when you unplug the sending unit and then turn the ignition is on,,Does it go to full?

Ugh. Unplug the sending unit? Doesn't that involve dropping the tank?

I believe that you should be able to w/o dropping the tank. I can on the TJ but i haven't looked under the YJ in a while.
I kinda can't get too close to the YJ, Bees have made it home for the summer.

The gauge on the YJ should stay exactly where it was when you shut the Jeep off, give or take. Sometimes I'll come out to find mine has actually crept up a little bit, but you're correct in your thinking Geoff. You could just have a bad float, not sure if that has anything to directly do with the sending unit. I know when my pump shit the bed a few years ago the float was way off when the shop re-calibrated everything and it was telling me that ~12 gallons was a full tank. The float can be adjusted, but that is without question a dropping the tank job.