Our SFDC Contacts are synced with MKTO. When a visitor fills out a form on our website, a new Lead is created (which is what we want); however, if that email address is already associated with a Contact in SFDC, fields in the Contact record are getting updated instead of in the new Lead record. So the new Lead hits our Inquiry Queue, but the pertinent details (Lead Source, Description, Campaign, etc.) are missing b/c they are being updated in the Contact record.
How can we ensure that the info passes into the Lead record?