Hi Alexandre,
Do you mean the original subscription form?
Or the modify?
Ideally, when the new subscriber chooses to click on confirm in the first email,
he would go to a form that doesn't immediately confirm his subscription.
It would go to a page that shows all the info,
and the lists he's subscribed to (like the "modify subscription" page),
and below it would be "save and confirm" subscription or something.
Happy to pay someone to do this, it feels like a clean way to double check
and confirm both the subscription and the info at the same time.