It would appear that the repository downtime setting is extremely unreliable. I have now set the repository downtime settings multiple times and basically every single time I open the dialog it shows times different from those I have set, and also Continua apparently has operated based on those incorrect times. Most often it appears to offset the times by two hours to either direction.
And actually this appears to happen basically whenever I close the dialog: 1) I open the repository settings dialog, switch to the downtime -page. 2) I set the repository downtime to be every day from 04:00 to 04:35, and click Save 3) I open the repository settings dialog, switch to the downtime -page - the page shows the downtime as 06:00 - 06:35.
I suspect this is a bug in the code that detects the browser timezone. I just tried it here and it appears to work fine. Can you check the web.config for the site and see if it has this line (under system.web) "