The Jam used to issue ten inch versions as well as the seven inch so that fans would buy both versions and the number one slot would be assured. I suppose they might have put the original version on the ten inch as well to fill out some of that unused vinyl. Perhaps some charts treated the two versions as two different releases - which they were really.

Come to think of Nena's it, 99Luftballons - had the original version on the flipside of the big disc containing the remix and the instrumental version.