What you have posted above is correct. As far as I have read, there have never been any
HPV+ cancers found any place other than the base of tongue, tonsils and oropharynx.
When we talk about oral cancer, here on the forum, we are including these areas in the same group with cancers of the mobile tongue, floor of the mouth, palate and gingiva, etc.
I think that the confusion you have is all based on a matter of symantics.
I hope this clears it up for you.
Maybe Brian or David will have something to add.
Jerry