Unknown track = Happy Cycling

From the pinned bootleg thread> "mp3: Aquarius, Happy Cycling, Olson, XYZ - unknown (please identify track name)"

I'm slightly confused....this "unknown" track is obviously an earlier version of Happy Cycling, but why is it in the same radio set as....Happy Cycling?

I posted something about this a while back. The version of Happy Cycling that was actually broadcast on the John Peel programme during the session is different from the one on the Peel Session CD, but I've no idea why.