miles more friends question

Here's an odd one. I've recently had some friends fly who joined the flying club on my Miles More Friends system.. but this is what's shown up in my account?

XX Apr 2007 Member Recommendation Bonus LHR-EWR XXXXX 1,000
XX Apr 2007 Member Recommendation Bonus EWR-LHR XXXXX 1,000
XX May 2007 Member Recommendation Bonus LAX-LHR XXXXX 7,500

Anyone know why I get points for both legs for one trip, but only for one leg on the other?

The first two are for the same person who fly Economy, the second one is for someone else who flew PE

[Neil]

Don't know why you only have 1 legs worth but you have got lucky because MMF miles for PE should only be 5k for a round trip, 2.5k per leg, so the fact you have 7.5k I would just be happy and not worry anymore about it.

Neil

I got 7,500 added to my account in Feb for a mate who flew to LA in PE. It was only one entry on my statement as well.

If I remember correctly, wasn't there some kind of offer a quite a few months back for the extra miles (instead of the normal 5000), or did I just imagine it[ii]