My understanding is adults won't get a smoke leaf addiction if they only take it every other day. That's what the policy is set to and two people developed an addiction. What could I be missing? Or does the policy need to be a little more strict to account for them taking some at the end of a day and then again in the morning the day after? (~25 hours instead of 48 hours.)

Edit: The schedule is its own thing apart from "for recreation" and "for addiction". The proper way to avoid addictions would be to leave "for recreation" disabled and set a threshold on the schedule for when they should use them. I'm still not sure if they have "any" for mood and recreation and "every x days" if they take them on a strict schedule regardless of mood/recreation or if they still consider them. It's hard to say because I have a mod installed that affects that as well.