With Diskeeper scheduled to run once a day, why does it sometimes skip a day?

When Diskeeper is scheduled to run every 24 hours, it runs and then, when finished, it reschedules for 24 hours later. For example, if Diskeeper starts defragmenting at 11:30 PM on Tuesday and runs for one hour, it will reschedule for 24 hours later, or 12:30 AM on Thursday. Thus, it appears to have skipped Wednesday. To have Diskeeper run every midnight, use:

Run : continuously

When : everyday

Between : 12:00 PM And: 1:00 AM

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