Captcha misentry forces registering users back to home page?

I realize that this may have already been discussed, but I cannot find it through the search on this site! So, I am posting this, hoping for a possible tweak or fix or suggestion from someone.

I see that if someone tries to register on the site and misenters the captcha, they are redirected back to the home page. Does this have an intended purpose, besides the fact that it would TERRIBLY annoy a potential member of my site so badly that they give up right away and forget about trying to register?!