I know this is gonna sound stupid, but play with the position of the filler nozzle when your filling,(no experience with your vehicle) sometimes the nozzle has to be jiggles to go all the way in, sometimes its better if it sits back a little bit, try it out, see if it helps. you should never fill it up on the last setting on the nozzle(the clicking, holding mechanism on the nozzle handle) I have always heard you get more if you use the first or second click, and always fill up as early in the morning as you can, right as the sun is coming up is best.
Now enter someone who HAS experience with this model to let you know if there IS an issue.