I have medicines to take twice a day. I set up one task for the AM, and one for the PM. I'm Chromophore for the Alarm, grid calendar, task list, and analog clock. I have the other windows hidden.
Options-->Calendars-->Default "Enabled", nothing else checked.
Start time: 6/6/2013 9AM or 9PM
Alarm: 0 minutes before task is due
I heard & saw the alarm one time so far; it has never notified me as scheduled. I'm hoping I included enough to let you see what I'm missing, but if not, please ask, and I'll add whatever might be missing to my next post. Thanks for reading.