I'm sure I heard somewhere recently (may have been at the ICPS Conference?) that there is only really one recognised form of Drosera binata, and that is "Drosera binata". All other forms and varieties are unofficial and unrecognised by botanists, and are basically all variations of a theme anyway, regardless of how many time the leaves divide.
<lights blue touch-paper and retires to a safe distance!>
Saying that I have a plant that I received from Alastair Culham a few years ago, which only splits once. I've never tried propagating from seed though! And, yes, I have it labelled as "T-form".