Tried to post a note on a thread, noting that all the stuff was getting killed within a short, time, somehow it decided to create a new topic. And you can't even look at that topic that i just created, now. Feel free to kill it. but the behavior seems wierd.
Also, many of the links for this board to k2c seem to be dead, you appear to have someone spidering it.
Also, requesting a new image from the verification resets the entire PAGE, wiping anything typed, which is hardly what would be expected. That may be what happened above, if it also wiped the subject and reset it completely making a "Reply" into a new topic request.
Given that that word verif system you're using is ONE of the most consistently unreadable I've ever seen, wiping the page and any message is pretty user-hostile, I'd suggest.
Not saying what to do, but both a different verif and a less hostile "a different verif" handler is something to consider.