Phone: Galaxy S5.
My wife and I keep our calendars in sync via Google but, for some time now, none of her entries seemed to appear on my phone - but mine appeared on her's (she has a different Samsung model phone).
I've just discovered that actually her entries ARE on my phone, but the S Planner sync has placed them into my 'Samsung Calendar' and not into the calendar associated with my Google account (I don't display Samsung Calendar normally to ensure that I add entries to the Google calendar so that they get synced!).
Any idea why this might be and can I stop this? It seems stupid that entries she creates, that are synced via a shared Google Calendar, end up in my Samsung Calendar!