at some point late in any film's theatrical run, they stop tracking the box office daily, and only update at the end of the week or maybe at the end of the weekend in addition. I didn't expect this to happen in the middle of the week, though! But perhaps that is what has happened.
Well, a blu-ray disc generally won't play in a DVD player, so that's why I am assuming they will be separate discs. I think a CD is compatible with a blu-ray player and I know it's compatible with most DVD players, so I guess I just thought it'd be an extra on one or both (edited to add- what I mean to say is that either the blu-ray or the DVD, or both, would "play" the soundtrack as if it was a CD). We'll see!
none of WB's films had their numbers reported for Tuesday and Wednesday
Up to this point this year WB has been reporting the box office for all their films right up until their last day in theaters, so perhaps it's simply that the Wednesday holiday had something to do with the lack of reporting.
Are you sure that they actually post the box office daily, though? Or do they just report all the numbers for the week at the end of the week?