Fuel Guage slow to rise on refuel

[monaghana]

Hi this is minor, but I find that when I run down the fuel tank and then refuel, the guage is very slow to register a full tank. It starts to creep up to full over a couple of miles driving. Once it's at the top I can switch off ignition and back on and it jumps right to the full mark. Appears to be showing correct fuel level.
Is this normal?

[landrovered]

Mine does the same thing and if the light comes on and I do not put in at least $25 in gas it will sit on "E" and scare me even though I know there is fuel in there.