unable to post after first attempt failed

I entered the text of my post and clicked Post button without noticing that it requires the Captcha verification. So it complained about the Captcha words not matching. I clicked Back, entered the Captcha, clicked Post again and then it respoded that I had already posted this topic. Which is of course not true. I am stuck.

BTW, why on earth do you require the registered users to verify with Captcha any new post?

Also, your Captchas are extremely hard to read!

BTW, why on earth do you require the registered users to verify with Captcha any new post?
Spam protection ;)

Well, I can understand that, though it is the first forum I have ever used (out of a few dozens that I am registered to) which is THAT SECURED.

Still, does this “protection” extend also to the first part of my problem, making it impossible to retry the post if one has made a mistake in Captcha? This would be really paranoid.