Captcha/Security validation failures

Hi, Just got Form Builder and really like bringing all of the validation and form functions "under one roof". Thanks, saves some decent time.

I've tried creating several forms with both text field validations and security validations. The text validations work correctly (i.e. email format errors are caught, etc.)

However, both the captcha and security questions fail. They display the validation error messages when left empty but upon filling in the boxes, I can put anything in and the form processes, sending out an e-mail via Universal Mail.

I have not changed the Action (contactus.php) and the form is set to the default Post.

One annoyance has been that when I delete the security features via the Form Builder interface, it apparently leaves parts of the php code in the page. DW/WA "discovers" the orphan code and asks if I want to delete it. If I say yes, it doesn't appear to actually delete, instead code is removed that prevents me from re-entering Form Builder forcing a complete form rebuild. (Very fast with a saved custom preset - but still...)

Just looking for some insights.
Thanks!
Mark