First of all, a thank you to anybody willing to read my question and help out.
I’ve just started using vassal to play M44 with my brother by email. So far he’s been able to open all my logfiles and step through my actions. When I open his file, I can only see what he’s done. The button you click to step through is all greyed out. It seems he’s beginning a new logfile correctly, and ending it after his turn, but I can’t see him playing his card, rolling his dice, etc.