Fuel Tank -16 gallons.....why can I only put in 10 gallons?

not dented or damaged....everything is in place as it should be.

When I get to 9.5 - 10 gallons it clicks and if I try to put more fuel in it.....it overflows and runs down the side of the car...FULL.

I have never tried to run it "below" displayed Empty.....and cant see that (2) senders are inaccurate...or the float arm bent or out of whack.

Makes no sense to me.......