The sale doesn't include the DLC, but the pack does.
When you look at the pack, each individual item shows the 75% discount EXCEPT the DLC.
I think what he meant is that it wasn't supposed to be in the pack.
Of course, while it's there, if you want it, just go ahead.
I was seriously considering it, considering the pack costs less than the DLC alone, until I realised that the DLC is multiplayer only.
I have already got Warband & don't tend to play multi, so not really much here for me.