Whats up with the time? (AM/PM - 24hr)

Ive just realized that something seems to be screwy with the posted time at the top of each post... Ive got my time setting to 24 hour but im seeing both time formats...

an example from http://www.hardwareforums.com/fun-ti...oft-not-15876/

Page 1:
15-12-2006, 18:14
15-12-2006, 07:00 PM
15-12-2006, 07:26 PM
15-12-2006, 07:41 PM
15-12-2006, 08:07 PM
15-12-2006, 08:26 PM
15-12-2006, 08:31 PM
15-12-2006, 08:45 PM
15-12-2006, 08:57 PM
15-12-2006, 09:29 PM
15-12-2006, 11:02 PM
16-12-2006, 10:02 AM
17-12-2006, 06:50 AM
17-12-2006, 10:56 AM
17-12-2006, 11:03 AM
Page 2:
Yesterday, 21:36
Today, 02:13 AM
Today, 06:19 AM
Today, 09:58 AM
Today, 10:23 AM
Today, 01:35 PM

why is it switching between 12 & 24 hour time format? (and whats with times like 07:00 PM???)

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