Reminder sent at default time rather than time set

I have a todo set up for each day at 10 a.m. My default time for reminders is 15 minutes before, but for this one, I changed it (update via email) to remind me at 8 a.m. This worked great.

Yesterday I had to delete the reminder and create it again (changing some other detail in it). Again, I set it up for 10 a.m., then replied to the confirmation email with an update to change the reminder time to 8 a.m. I received confirmation via email that the reminder would take place at 8 a.m.

Nothing happened at 8 a.m. today...

At 8.02 today, my daily digest was sent to my email. The first item on it is my 8 a.m. for 10 a.m. reminder: "Email, SMS and twitter reminders at 8:00 a.m.", it says.

But the reminder was sent at 9.45 a.m.

How come?
 
sad I’m convinced I got this right so how come it's not working! LOL
Inappropriate?
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