I may be missing something, but I wondered why an allip (MM, p. 10) has a synergy bonus of +2 following tracks (instead of no bonus because it doesn't have spent 5 ranks on Search)?
I assume it has that +2 to track due to that fact that an Allip "unrelentingly pursues those who tormented it in life". Sounds more like a circumstance bonus rather than a synergy bonus, the +2 to track is there because of the Allip's nature.