I've had now several times a syncing problem with Jorte:
The events appear in the web GCalendar at correct dates and places, but they do not update to Jorte no matter how many times I try to refresh. Renaming, or moving does not bring them "alive". Hard to say, but this problem seems to occur after moving the events in web-GCalendar. After that, they just keep their original date at Jorte while web-GCalendar shows them correctly.
Doesn't appear to be an issue with Jorte though because stock calendar does the same thing.