I know that this will probably get me seriously shot but I have to correct a couple of things here.
Just like my refereeing career, for once over 90 minutes I was in just the right position to see the (non) offside. Admittedly Lee Elam was indeed in an offside position but sadly the ball to him was played by an Alty defender (sorry don't know whom) this sadly put Elam onside.
As Jimmy says, there was a push so there was a penalty, yes it was a soft pen but a pen it was. I think that we were a touch unfortunate that the only players in the Penalty area were Munroe and the guy he pushed. The Ref therefore had a totally unobstructed view. Had there been more players in the Box, or had the Ref's position been different we might have got away with it. In law it would have been no less of a penalty, but Penalties not given are by definition NOT penalties.
The fact that nobody appealed is, I'm afraid a total irrelevance as is the fact that the Exeter fans (from probably 100 yards away) didn't think it was a penalty either.
I'd remind people of the penalty we got at Oxford which I seem to recall wasn't appealed for at the time either