Was there a cut scene of Doyle, Carl, and Vaughan driving to the store?
In the film there's the scene on the patio where Doyle and his friends are going to go to the liquor store and he invites Carl and Vaughan to go along. There's some argument from Linda but eventually they get up to go with him and then we just cut to the scene in the living room.
It seems to me, given the dialogue and the dynamic of having those characters together in such close quarters at that time it would have been a scripted and filmed scene.
I've never seen the director's cut but I did find a picture of them in the truck together.
http://www.dvdizzy.com/images/q-s/sling-16.jpg