Dennis @ PerfectForms
I never use the box that says “Mandatory answer” in the properties of input objects for this very reason (and others). If you have a multi-page form your users will not find out they missed a mandatory answer on page one until they have reached the last page and try to submit. You loose a lot of users that way!
Instead get used to using the Check Mandatory behavior object behind your buttons that take the users to the next page (use a button with a Show Page behavior after the Check Mandatory behavior, not a Page Button), and the submit button. Your Save button can simply have a Submit behavior object behind it and not bother checking for mandatory fields (although you should check for at least name and email so you know where to send the notification).