Having followed this post as some have and have not splashed back fuel.
Here is my FWIW story......years ago when an 8300 gal tanker dumping fuel spashed out/over where the hose meets the fitting installed on the underground tank. Fuel shot back which looked like a fire hydrant opened according to a witness...we are now talking mega fuel spill. It was our lucky day with no explosion or fire. And that is a understatement.
As it turned out some critters over a long period of time had restricted the above ground pipe venting from a 15,000 gallon underground fuel tank. As the tanker is unloading fuel using a 5 or 6 inch hose the venting was unable to handle the displacement. I claimed the spill happened due to a overfill of product from the tanker as the amount should of fit. We always stick the tanks, read the chart a compare gals on tanker to space in storage tank. Pretty high tech math.
To make a long story short your fueling splash backs might be caused by some restriction in your fuel tank vent system. This might be in someway related to some do/ some don't. Another idea would be to just "slightly" crack open the oppisite side filler cap to allow air to escape while fueling.