Has anyone had a problem with the fuel gauge not being centered in the "fuel gauge hole" in the plastic covering? Has does one fix it?

 

Same hing with my eiger, its fine

 

Mine's the same way.
You can center it a bit buy removing "all" your fasteners on the surrounding plastic and making little adjustments.
But it'll be just a cosmetic thing until the next time you ride.
My advise, leave it alone it isn't harming the function of it.