Can't turn off default alarm. Aggrivating!

I have my iCal set up to sync with Google Calendar because of my Droid. I have 6 calendars, and by default iCal adds new events to my Google "personal" calendar. This is fine.

What is not fine is that any time I create a new event I find myself stuck with a blasted Email Alert and Message Alert. I do not want them!

I've gone into preferences, I've checked the box next to "turn off all alarms"... if I create an event and I create it under, say my "Work" calendar, then the alerts don't show up - they don't exist. That's what I want! Just for some reason I cannot set up my stupid default "Personal" calendar to create an event without setting up alerts.

Help!