I'm still having a hard time making edits to the existing form. When I select the form in design view and choose to edit the contents it seems that the form is blank. Is this the same thing that you are experiencing? If so were you only able to edit the form when first applying CSS Form Builder?
If you are able to edit the form on the page in it's current fashion it indicates that there is some other problem possibly with the resulting code that was produced. If this is the case I will open a ticket for you on this issue, please post back and let me know.
As for the info page I was just referring to the page that the form posts to. It is this page that will have access to the info from the form. If you leave the action blank it will post the information back to that same page. The server validations work with the posted information and the code for them goes on the page that is specified for the action of the form.