Timing of posts...

I've noticed this for a while now. Sometimes when I post, the system records the time of the post incorrectly. For example, I make a post at 3:30 and the system records it as 3:55. Then all the posts in between, say 3:35 (when the system corrects) and 3:50 will be posted above my post, as the system thinks that these posts were entered earlier. This is particularly confusing when someone wants to reply to a post, but his reply shows before the original post. Any way to fix this?