Scheduled Downtime still sent notifications

Hi all.
Nagios 3.0.1
Cent OS 5.1

I set a bunch of servers for scheduled downtime last night, as the building they were in was losing power for the night. Since they are all in a hostgroup, I went to the page, scheduled “downtime for all services in this hostgroup”, as well as for the hosts, on that same page. I checked the web interface before I left, all the hosts and services had the white cloud with zzzs icon on them, it looked all good to me. Power went down about 6PM, back up around 8AM, the downtime was for 5PM-9AM. I had 1,000 emails this morning reporting those hosts were down every hour. It was my understanding that scheduled downtime disabled notifications, yet it seems this was not the case.

Ideas from anyone?

Thanks

-peter