Bismarck

I have just set up a PBEM game of Bismarck on Vassal for the first time and have hit a couple of problems.
First both my opponent and I can see a log of the others moves which defeats the object of secret movement. Secondly when I got the file back for turn 2 some of my units (British) had disappeared from my searchboard.
Can anyone who has played Bismarck successfully give us some help?

with thanks
Bryan