Issue with Sign-Up Form Showing on Every Linked Page in Campaign

I am at my wits end here. It’s been a full week and we still don’t have a form that functions as we intend it to and we need help.

Here’s how we got to where we are and where we are stuck:

• We needed a form that we could link to, to allow subscribers to updates preferences
• We learned that we could only do this by creating a sign-up form, so that’s what we did
• This is not an e-commerce site, so we then had to install the snippet code in order to be able to publish it
• Snippet code was dropped into the master template on WordPress
• So, we made sure to set it to a full page form and we were able to publish it to a specific page that we created on our website xx.com/email-preferences
• We realized that we were able to see it only once, so we then went in to adjust the settings so it showed every time that specific page was visited
• We then created a test email campaign that had absolutely nothing to do with this form and no link to the form was included in the email campaign - only links to different pages on our website
• I tested all the links prior to sending and the campaign performed as expected
• Email was sent and then everyone who clicked a link that went to our website whether it be the homepage, careers page, etc. encountered this form, which again, is on a hidden page on the website - there’s no way to get it unless directly linked
• And to make matters worse, when you type in our domain to the homepage directly in a browser, you still encounter the form
• How or why is this possible when it is only published to a specific page???