I had an issue with Google Calendar, but figured out what it was. It only showed me a couple of weeks worth of stuff. Whenever I entered stuff in March and April, it did not show. There is a setting under options in Sync "Sync Events for next" it will only show you up to that point. Once I changed it to 24 weeks, i have not had a problem. It runs great for me and my wife. Not sure if this is what you are running into.