I don't know who started the retarded rumor that Landy and Bourne reenacted their conversion so Landy could change the birthdate as a signal to Bourne where to go.
It's the most retarded thing I've ever heard, especially because Landy gives the same date in both movies.
The timeline thing isn't hard to understand either. After the huge car chase in Supremacy Bourne walks away limping. Then, X amount of time later, they show him making the call to Landy.
Ultimatum starts off at the end of the car chase in Supremacy. The first half of the movie they continue chasing him. Then right in the middle of the movie is the call from the end of Supremacy.
So the timeline is:
1. Car chase, Bourne limps away. (Supremacy)
2. More chasing. (Ultimatum).
3. Bourne ends up back in NY and makes the call to Landy (Supremacy/Ultimatum).
4. More chasing to the end of Ultimatum.
Code:
?? ? ? ? ? ? ? ?--------------------------
?? ? ? ? ? ? ? ?Ultimatum
--------------------------
Supremacy ? ? ? ? ? ? ? ?^
?? ? ? ? ? ? ? ? ? ? ? ? ^
?? ? ? ? ? ? ? ? ? ? ? ? Bourne's call to Landy from NY
Brilliant if you ask me. Oh, and Bourne is probably the most badass motherfucker in the history of action movies.