There is this bug where I can't merge fleets properly. I'm trying to do so while including a command ship. I was playing the crusade expansion.
For instance, I have 26 logistics units of ships while having a logistics cap of 24. With the command ship, I should have a cap of 30 (25% more). However, I couldn't merge the fleets when they where both occupying the same tile (using manage). When occupying different tiles, I could not add the fleet that had command ship to the other fleet. The reverse however worked. I was able to add the other fleet to the fleet that had the command ship.