Just a minor issue, but I came across this while testing...

• Create 2 accounts with the same credentials. Accounts A and B (name accounts differently).
• Select the same resource in both accounts A and B, for example a calendar named "Personal" with path X
• Sync any account, any number of times.
• Check last synced timestamp for the "Personal" calendars in both accounts.
• Only the first (or last I don't know) is updated. The other one stays at "Never synced" although it syncs successfully.
• User could get the feeling that the sync was not performed then, althoug it was.

Maybe we are setting the time stamp only to the "path" without enclosing it "per account"?