Hi DJD,
With the AutoDJ feature, please be aware that tracks on the Auto DJ playlists are never interrupted mid-track. So if a longer track (or mix) was playing just before another scheduled playlist was due to start, the system would wait for that track to finish playing first. So as in your case here, if a long House track playing is around 8 minutes in length (for example) it will run for the full 8 minutes before another scheduled playlist kicks in.
So with this in mind you will have to build and calculate the playing length of your playlists around this.