I noticed about 1/2 way through HotB that they were plowing through all the fights, so I gave the Carrion Guards and Initiates a level or two, this was probably my biggest mistake.
I'm thinking I can either:
-Level up the fights in Jackal's Price, but keep the xp the same as it would be normally (probably my best option)
-Find a level's worth of fighting/xp to skip (don't really want to do this)
-Level up the fights in Jackal's Price AND give out proper xp (could be fun, but could get a crazy if they're level 15 by book 5)
-Switch them to the Medium XP track (not a bad option, can always switch back to the Fast Track if necessary)
I have been using the Medium XP track and found if you add extra it keeps you right on pace or close to pace. By being ahead it should even you up.