AS,
The issue of the Time Stamp is as I explained on the other thread that you made: when a thread becomes corrupted, it sets onto USA East Coast time, and will remain so because the back room gurus don't know how to fix the problem (and an upgrade is on the cards which is More Important).
The poll time warp is a different issue: it is set such that whenever a vote is cast on a poll, the thread jumps to the vote time on the Forum home page, thus adjusting (falsely) the time of the latest post. On opening the thread, of course, the time on the latest post is shown correctly, which may be hours and hours before the time on the Forum page
Confused? Just imagine what it's like for us dealing with all the threads and post, then trying to discuss it over on the mod's forum with the likes of tailly, who has enough on his plate wondering which century he's in .....