We are updating the soundtrack to include all of the new music!
I have been working on an update with some fixes and balance tweaks, this will be going live sometime next week.
Also, about the soundtrack update - if the song titles dont seem to match to the music, this might be because your local files for the soundtrack have failed to update locally. Sometimes this is because your system is preventing steam from overwriting the files. Running steam in administrator mode should usually fix this.