It does not include the kits, the .pbf just consists of the songs.
FYI, in the BBM, an asterisk prefix to a drum set’s name indicates the kit name and that it is not imported or active. Once the kit has been imported and the box is checked, the asterisk prefix should disappear.
I believe there is something similar in the BBMO Drum Set: dropdown. if the drum set has been imported to the project but the song displays Standard and you recognize that that can’t be the right kit (say the song is an OPB), you should see an asterisk prefixing the title of the kit in the Drum Set: dropdown. That way you can select the kit for the song. If the kit is not part of the project, all you’ll see in the Drum Set: dropdown is Standard (the appropriate kit prefixed with the asterisk will not be displayed). I’m not sure that this happens 100% of the time as I just recently came across the asterisk prefix in the BBMO Drum Set: dropdown. Hope this all made sense.
It’s looking increasingly that this may have something to do with user-created kits that exceed 100Mb. I’ve asked Singular Sound to please allow kits that are slightly over 100Mb to be processed by the BBMO, just as the BBM has always allowed. A “fudge factor”, if you will. 
Allow drum sets slightly larger size than 100Mb in the BBMO - #2 by DanielSingularSound