Is the statement above documented as fact or is there a bug?
I asked the same question in a different post and was given a different answer than the poster above.
My testing of approved themes does not show that searches can be sorted by the gallery order. Or by the custom options offered in gallery sort order.
I tried "filename,date" or "date,filename" as parameters for gallery sort, but it seemed to have no effect at all on the the search returned.
Actually....when I use custom sort "date,filename" I get a MySQL error when I initiate a search.