Weird behavior with pre-selected form options

Hi there, we are building a landing page for leads to modify their email preferences (link below)

Email Preferences

We built a form that has a series of radio buttons where leads can opt in or out of certain emails, we also have a checkbox at the bottom to completely opt out of all emails in one go. The radio buttons are set to have a default value to opt in for all email options but they only appear to be pre selected in chrome incognito window and safari. 

I was also interested in unselecting all the radio buttons if the checkbox is selected and vise versa.  So i wrote some javascript on the landing page to do this.  Again it works in the incognito window but not in a normal chrome or firefox window.  I tried writing some javascript to clear out any form caching but with no luck.  Has anyone else had issues with pre-selected values in marketo forms and have a solution they a willing to share.  Thanks in advance!

-John

$(document).ready(function() {
    $('input[type="radio"]').change(function() {
        if ($(this).is(':checked')){ //radio is now checked
            $('input[type="checkbox"]').prop('checked', false); //unchecks all checkboxes
        }
    });
    $('input[type="checkbox"]').change(function() {
        if ($(this).is(':checked')){
            $('input[type="radio"]').prop('checked', false);
        }
    }); 
});