I think, but am not sure if I had to put the time and date in again. One will perhaps try again. However, the odd alarms are becoming rare.
The other clue was, when going to Organizer - Alarm. It would always show the time and cursor...one could put the time straight in. When it went all peculiar, the same key sequence offered ON OFF. This has now gone back to normal.
If it was any other piece of electronic equipment, I'd give it a good talking to, but I think a phone would be immune to that