It would be nice if a trigger with multiple items could be checked once over a period of time rather than each time one of the items has been checked.

For example, I have a trigger with two items. And, the trigger is configured to alert on multiple true events. Item1 and Item2 are checked every 30 minutes, and the trigger conditions use change() for both items. The problem is if Item2 is checked 5 minutes after Item1, then this generates two events, even though the data may be the same. That is, Item1.change()=1 and sets off the trigger. Five minutes later, Item2.change()=0, but because Item1.change()=1 from 5 minutes ago, a different Event ID is generated. So I get two alerts on basically the same data.