ATH seems to be registered for times that aren't the fastest for that particular game.
See:
http://www.purposegames.com/game/1167/info
I've seen this on several occasions so it is not a one off.
Strange ATH's (4 posts)
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niklas
Member
Strange ATH's
Posted: 2008-05-20 16:35:49 # 
Veejay
Member
Strange ATH's
Posted: 2008-05-20 17:23:03 # Within the last hour I've noticed that as well:
http://www.purposegames.com/game/2562/info
edi68815
Member
Strange ATH's
Posted: 2008-05-21 10:24:21 # Those two incidences seem to have been fixed. That or I don't see your point.
If you mean what I think you mean then I have noticed that sometimes too, and it's like an ATH expires after a certain period of time.
niklas
Member
Strange ATH's
Posted: 2008-05-21 11:01:44 # What caught my attention was that the "Latest Record Broken"-feature on p1 showed that there was a new ATH for one of my games. When I clicked on the game the time listed as an ATH only was the 9th fastest. But as you write, it all seems to be corrected now.