Yeah I noticed that on my smart list too and good thing I didn't go forward with my smart campaign, because not all that are from Canada have the .ca on their email. As a matter of...
I wonder if the the lead record is missing the minimum requirement to sync over to SFDC? I've seen this happen before in my instance where I at least need the last name and company...
Yup and it's also hard for some of my team mates to see where the run once icon is. They're used to clicking on a "Schedule" button from the old email tool we used to use.
Honestly, it kind of seems weird not to have a submit button for a form field, but that's just me. I hope it will be obvious to your audience as to what they need to do.