As stated in the Notes, the first composer of "Strictly Instrumental" is correctly Eddie Seiler. I am reasonably certain that there are two variants of the label, one (see the associated video clip) that spells his name correctly, and one (see illustrated version) that spells it as Seller. It is not uncommon to have difficulty distinguishing a poorly printed "i" from an "l" on label photos, but I think I've seen enough photos now of sufficient clarity to say this with some confidence.
The third composer of "Strictly Instrumental" appears on the label as Benjemen. This spelling is not infrequently encountered on record labels, although it is apparently incorrect. The person represented by it is Bennie Benjamin.