@Videoguy - Confirmed!
All schedules in 2.5 group their respective zones together, and take the lowest "common denominator" when deciding to skip. The schedule will adjust as a whole, deciding on watering events for each schedule and not the respective zones individually.
For this reason, it's recommended that zones with similar attributes get grouped together into separate schedules.
Based on feedback, we'll certainly be iterating over this design going forward.
Thanks for your question, and happy watering!