if groups of 1 still count as groups according to batoto's definition, then i think group pages for them should still be made, since they should still be paid due credit (and thus be entitled to a group page), even if there's no way to contact them. that's what batoto group pages are for, anyway - giving "enhanced" forms of credit.
some scanlators have probably never heard of batoto and hence never use their group pages on batoto, so should they still get a page? it's that line of logic. it's not really a matter of redundancy or anything, a group page or two won't change much. no group should only be for uncertain / lack of credits on released chapters.
The complete description would be:
This is a reserved group for identifying any works that were not possible to attribute or anonymous. It may also be used by individuals who are publishing but do not wish to be identified as a "group" (Group of 1 is still a group).
So, to me, it sounds like the "group of 1" is mainly referring to groups like as yours, Vis. Or wait, you have members now, don't you? Another good one would be
display; none;.
There's nothing wrong with that but I would only add the page if there is some sort of content by them on Batoto. Many groups start out with only one person and after a while others join in. (Grumpy is an example of that.)
It's true that the label "group" is misleading. I can't think of any other better and similarily short term, however.
Though I think it's a tad difficult to re-identify those "groups", once a certain amount of time has passed. Well, unless those "groups" do so themselves.
Anyway, according to what you said, it's not actually correct (not the original idea, etc.), but it's not really incorrect/bad either.