Cruel,
Yes I understand DD working exactly how you told. But from 15 duels I won after starting developing DD I got 15 times 0 SE / 100% of my duels /. During previous weeks I never got 0 SE / usually get 600-800SE from one duel /. I am not saying it cannot happen, only seems to be for me very unrealistic - I already send message to Game Help. But many thanks for confirmation DD should not affect duels.
Jany
edit : OK. I got explanation from Miklos / staff working on Sunday
/, now everything clear for me. And yes - I am getting 0 SE from duels because I started upgrading DD skill.