I always feel like I should be able to get more in the fuel tank when filling it, but hey I just go with it.
Figure it levels out once get it off the side stand.
Never have sat on bikes when filling them. See others do it, but it just seems like a bad idea.
I have a couple 3/8 inch pieces of plywood I use as pucks on grass and soft roads and sometimes have placed them under the kick stand when filling.
Most I have ever put in the tank is 5.2 gallons US.
Never had it come out on me?