Why my checkbox labels are not shown?

The checkboxes from "Applies to:" field are shown, but the labels(text next to them) is not. Why is that happening?

I think that's due to the theme you are using. It has the following CSS codes that remove all checkbox labels.

.form-checkbox-item label {

    display: none;

}

To correct it, simply inject the following CSS codes to your form.

.form-checkbox-item label {

    display: inline-block !important;

}

Guide: http://www.jotform.com/help/117-How-to-Inject-Custom-CSS-Codes (Make sure to paste it at the bottom part if there are existing CSS codes in your form)