TNY280 Problems with the calculations.

Hi

I have tried to design a Flyback converter with a TinySwitch-III and the PI Online Suite
The basic parameters are:

Input: 85~265VAC 60Hz
Output: 12VDC, 2A (24W Simple output)

and I had some troubles with my calculations:

1) In the design results the maximun duty cycle (Dmax) is 0.64.
When I tried to calculate this parameter with the formula of application note AN-23 (Page 8, Step 8) the result for the Dmax is about 1.08.
I think this is impossible?

Anyway, I selected a Dmax=0.64, like the design tool results, and I went further with the calculations.

2) When I tried to calculate the primary inductance (Lp) with the formula of the AN-23 (Page 8, Step 17A) the result is
about 741uH, too far from the 1028uH of the design tool.

My question is:
1) What is wrong with my calculations?

I atttached the design (.uds file) and the apllication note scans.
Thanks

PD. Excuse me for my ugly english
Raul Diez.