#2 - May 15, 2013, 2:21 p.m.
Timestamps for posts are displayed relative to the current time on your computer. However, the time a post was made is based on the clock on the forum servers. If your computer’s clock is behind the forum server’s clock, it will display the time as if it was in the future.
If it does bother you a ton, try resynching your computer clock or click on where it says “one minute from now” and it will switch to showing the time instead of relative time. This might still be a minute further along than your computer clock, but it’s less noticeable.