Losing calendar alarms with new Maverick version

Since I upgraded to Maverick I'm losing calendar alerts if I snooze the alert..

I set an alert for two days prior to an event.

If I then snooze the alert for 2 hours, then power off my computer until the next day, I never get another alert.

If I check the event is says it has an alert at a specific date and time, which was during the time the computer was OFF, 2 hours after I snoozed it..

The older version did NOT work this way...

It seems like the new version instead of the snooze delaying the alert, it is setting it for a specific time, and so if the computer is rebooted and powered back on AFTER that time has passed then it doesn't raise an alert... I suppose they've built this app assuming that everyone just leaves their computers powered on all the time?

Any ideas of how I can get around this?

Seems like a lot of the apps got quite a bit worse with the Maverick "upgrade"...