Thank you, bstanko6 !
I'm especially glad to hear that according to what you say it's all normal apart my stupidity to not locate the plane, but humm...some training will do it I think
Also very glad that my modlist is out of cause and very well working up to now.
In the meantime I have played several times a historical mission with 2 ai planes, and found some interesting stuff:
With my modlist which basically only contains essential equipment fixes, the NewUIs and OHII, there is a major difference in the command 'Battlestations Level 2' from TWOS which doesn't exist in my modded game but a similar command is present in the icons (WO officer last on the right, and white 'Battle station' icon). I still have to figure out what this does exactly, but if I use it before the 'Man flack' command then the gunman will NOT move to the flack - for some mysterious reason.
Simply using F7 going on battlestations and giving the order to 'Man flak' will instead move the gunner to the flak.
Alright, I will scrutinize the readme of the TDWs' NewUIs in search of some explanation...
Thank you and cheers!