I have the contact form on the home page like the demo... I have this code in the widget:
<div class="gk-contact-form" data-cols="2">
[contactform name="yes" email="yes" title="yes" captcha="yes"]
The Captcha shows up on the home page but it seems like it gets ignored... ie. emails go through even though a person puts in the info in the captcha box or not... I do have Shortcodes enabled in the Shortcodes settings. I have the code above in the Bottom I widget section. The emails do get sent and I do receive them.
I rather not put my site link here... but that shouldn't matter as you see the code above and where it's at... site works in every other way. I am an experienced WP user.