Thread: What times does pruning happen when set to twice daily

What times does pruning happen when set to twice daily

Here are my settings:

Prune ads - Yes (twice daily)
Allow ad relisting - Yes

My test ad still shows at the frontend but says 'This ad has expired'
In the backend it the ad Status says 'Live Until 04/02/2013 5:51pm' - Should this not say 'Expired'

Now, my two options are: As i have pruning set to 'twice daily', maybe it has only pruned once so far today and it has not 'caught' the ad expiry at 5:51pm - If so, what time of the day does pruning happen when set to twice daily.

or

My site has already pruned twice today and has left this ad and something is wrong.

Please could anyone cast some light? Cheers!