I rang the DLA to confirm, it was playing on my mind and I wanted to know one way or the other!
It is indeed a 2 year award like the tribunal stated. The chap I spoke to sent out a 'manual letter' as it went first class and it wasn't auto sent from the system hence the mistake.
I'm ok about it, I haven't really lost anything as I thought it was 2 years after my tribunal result and had accepted that but atleast I know now, that's made me feel a lot better even though my award is already half way gone and it still feels like I hardly get a repreive before doing this all again!