I've had a look at the database schema and data but there's no data for the recurrence_id field since google calendar can express an infinite set of recurrences how is this represented in the database structure?
At the moment, the tool just syncs events from one month in the past through one month in the future, so it will pick up a finite subset of a potentially infinite series of recurring events. In future iterations, we imagine users defining their own timeframe to sync.