It has been brought to my attention that the "All Teen" package of All Ages NPC's has a serious flaw.
Basically, it seems that the Teen Burglar and the Teen Police Officer don't play nice together (for some reason). This issue is a game breaker, so please upgrade asap.
A temporary stopgap fix has been issued on the MTS download page, along with more details on the bug.
Also on the download page are details of a (smaller and non game breaking) issue with the workaround I have issued for the time being until I can figure out exactly what is wrong with it.