hobbit-alerts.cfg: behaviour of TIME and DURATION together

It seems the combination of TIME=W:0845:2355 and DURATION>15 in hobbit-alerts.cfg means the earliest an alert can be sent out is 9 am. Is this what you would expect? I would have expected these two rules to mean the test should be in an alarm colour for more than 15 minutes and be between the times of 08:45 and 23:55, weekdays. Instead it seems to be relating the DURATION with the time such that the DURATION only applies _during_ the TIME.

If the current behaviour is intended, than will using EXTIME instead of TIME be what I want? Oh! There is no EXTIME?! I assumed there was but I see no documentation for it apart from Henrik's suggestion that he might add it: http://www.hswn.dk/hobbiton/2006/06/msg00417.html

Kind regards,

SebA