If I remember right BB shipped DW as v1.03 ... Patch 1.04 is newer and unless they have updated their release it should be 1.03 out of the box. Which means all the missions should work as advertised (incl. Bills Campaign) unless of course you have patched the game (which you did) in which case you need the new version of the campaign (but to be fair, thats not something BB was/is aware of or has to take care of, as their product works as advertised - well, 1.03 works as 1.03 should ...
).
Outsourcing is nicely put ... as far as I see it they basically looked at Bills page and (I guess here) asked more or less everybody if they could use their missions for their release. Only Bill (I think) actually made some new missions for BBs release.
Cheers
OS