'No, it's not an edit because part of the song before the album mixture appears after it. So this mixture was edited in after the whole track was mixed.'
Dude you're splitting hairs there. Technically you are correct, but of course it's an edit of an official release.
I can see what they were going for, in that it’s supposed to be a pun - they’re literally giving the listener ‘more of that jazz’. But yeah, sonically it’s completely shite and they should have known better. It’s those missteps in the production which have led to Jazz being rated so poorly when really, most of the material is well up to the same standard as NOTW.
I dunno… it's like the end credits of a film having flashbacks, or the last scene of The Usual Suspects where all the pieces fall into place. It's 'that song' on 'that album' that has 'that bit'. Where they tried it again on some 12" remixes a few years later it was old hat. Good on them for it.
Maybe should've done it on Fun It instead - keep all the shite in one place :)