no, my posts do that also...i always use the "quick reply" box just like any vbulletin forum, but when hit "post quick reply", it sends me to the advance screen and gives me the prompt that i have already posted and that the forum only allows posts every 10 seconds...it will proceed to tell me that i have to wait 9 secs...but if you scroll down to where it gives you a view of all the responses in the thread thus far, the post that i have just posted is already in the thread...
so i usually use quick reply as usually, then when it sends me to that screen i just scroll down to make sure my post is in the thread...then, i just continue as usual...and lets do it one more time *hits post quick reply*