Yeah, I finally managed to "break in" myself by outright copying the HTML of the captchablock div. The dev console says it's because of the CSS IDs #imgoneField, #imgtwoField, and #imgthreeField on the registration page. Either there should just be one set of image captchas, or the IDs should be changed to classes so that they can be used multiple times. What's happening as far as I can tell is that in the JS block in the second captchablock set, the necessary HTML code is just being applied to the first location of #imgxField. Hence, the necessary bits of code aren't being applied to the second set of captchablock divs, which is remedied by just copying and pasting the HTML code for each captchablock. Changing to classes would make it a bit trickier, given that the beloved document.GetElementByID function couldn't be used then, so I'd say to just get rid of the second block of captchas, especially since it's just the same thing as the first block of captchas.