Form Submission Data discrepancies

Good morning everyone,

While creating the report in Insight Eloqua, one of our emails showed Form Submission data even though this email has no form in it. Has anyone of you had similar problem/situation? One of our colleagues suggested that this form submission data might be the unsubscription from email footer (is it even possible?), but as you can see the unsubscription rate and total unsubscribes by email shows 0.

I appreciate any help.

Thank you and have a nice day all.