Checkbox not validating fields correctly.

I have 2 forms that are basically the same. The content, fieldnames and script are the same however one file has additional pages.

The forms have a checkbox where in users will click it if they are done filling up. The checkbox has a script that verifies if all the required fields have been answered, if completed it will have a check, if not a textfield will show up and list all the items that must be completed.

The problem I have now is that the checkbox of form 1 is not validating correctly. When I click the checkbox on an empty form, it still shows the check sign.

Form 2 on the other hand shows the fields that need to be answered.

Fields of the additional pages in form 2 are not included in the checkbox script so that isn't the problem.

Any tips on how to figure out why form 1 isn't working?