Now this looks interesting: link
Contains ".....a short extract of an unidentified track: the other side contains an unidentified jazz-funk style instrumental track"
So....the 'unidentified tracks could possible be 'Feelings, Feelings' (or equally something else completely), but what is the other?
We need to know who bought this!!
Acetates aren't released, they're meant for in-house use. So a 'double feature' is quite possible, if it made sense to the person (e.g. mastering engineer, producer) for whom the acetate was meant.
Exactly, its an in house mastering example, which is why they were never meant to last or be listened to more than a few times, they were meant to be disposable.