Google calendar sync missing most items

Google calendar sync missing most items

I'm having trouble with the google calendar sync. Actually pairing with google and initiating and completing the sync works fine. However, I have a detailed google calendar, and most of it is simply not syncing over for some reason. I'm getting perhaps 3-6 items per week from a calendar that has 20-30 items on it. In addition, imported items are often at different times and even on different days.

What's going on, and how can we fix it?

Thank you,

Ben