I don't know if I'm supposed to do this or not, but I think I might actually be able to shed some light on the jumbled post phenomenon. A while back, the time zone settings went all screwy. I am in US Mountain time, which is -6 GMT at the moment, but the forum was saying that I was two hours behind. So, therefore, in order to correct the timestamp on my posts in the forums, changed my time zone to Eastern Standard Time.
As that prior glitch seems to have corrected itself, anyone who had done the same thing as I did to fix the same problem that I'd had would probably be the culprits of the wonky posts. When I readjusted my time zone setting, my posts went back to the correct chronological order.
I hope this helps someone.