This might be just me, but it seems like there's a big delay between when I post and when it shows up in the forum or on the home page. Also, the times marked on the home page almost never change.
Your browser might be caching. Which browser do you use?
I have the same issue, I also don't see quick reply posts until I reload. I run mobile safari for iPad
Quickly reply is bugged like that. It will say you have posted, but wont show the post. I stil have things to tweak on the website.