A. If you want your users to be automatically redirected to the signing page you have to set this:

signer.Link = Pronto.Signer.LinkTypes.Url

If you are in debug mode (Transaction.Debug.Active = True) then it blocks the automatic-redirect for debugging/developing purposes and gives you links to click on in the Transaction.Debug.FormattedReturn property instead so you can see all the signer links at once for testing. If you want to get auto-redirected, just either turn off debug mode or you can also set the Transaction.Debug.AutoRedirect = True so that it will go ahead a redirect (default is False)