This article states:
When a new lead enters Marketo from
•a form fillout
•SOAP or Munchkin API call, or
•List Import
Marketo automatically searches for a lead with the same email address. If that lead exists, the existing lead is updated instead of creating a duplicate.
Which makes perfect sense. Except that I just created my very first form, submitted it and:
![0EM50000000QAPD.jpg 0EM50000000QAPD.jpg](/t5/image/serverpage/image-id/147i8000BE5F952530A1/image-size/large?v=v2&px=999)
There I am, twice. As far as I can see, no typos in my e-mail address. So how could this have happened? I submitted the form a few more times, and then it DID update the newly created lead record, but it never seemed aware of the original lead record (which was manually entered some time ago).