Changes to schedule do not actually change schedule

I have setup scheduled snapshots that run every 5 minutes, 1 hour and daily. I chose the interval for testing before I configure them for the interval that will be in place long term. The snapshot I setup for 5 minutes is a test site, and now I would like to reduce it to daily. I edit the snapshot, change the schedule, and save the snapshot. On the All Snapshots screen, the schedule remains unchanged, and the next scheduled snapshot is still 5 minutes after the last one. I tried this with the hourly and saw the same result. It was originally setup to be hourly, I changed it to daily, but the next scheduled run is 1 hour after the last one.