I really dont understand this, i've got a logistics of 50.
I created a fleet of 6 ships, so 48/50.
went to my next lot of huge ships, went to put just two in their own fleet, selected both ships, pressed created and nothing happen except it changed just to one of the ships being selected and not both.
Got pissed of then and gave my 40 state of the art ships to a minor race i was allied with so they could do my bidding for me.