Form with Ecart Add button

O.k. here goes. I had this problem before and knew the steps to take, but now can't get it to work. I have a form that is multi-part. It's a logo design form that people input their info for a logo design and can upload images for the design, then a email is to be sent to me with the form images and info, the person who filled out the form is then redirected to their cart for payment. I cannot get the add to cart button to redirect to cart. I know the button generates its own form code, but last time for it to be multi functional (send the email as well as redirect to cart) it had to be within the existing form. Most of my forms are like this and they are not working, need help bad. Thanks.

P.S. I made field and graphics changes to my forms, then they stopped working. But no code was changed. I just need to figure out how to get it to send the email as well as go to cart with 1 click, basically.