I have put 2 units into a Trireme. (This actually worked only by adding a remote way point to the trireme, otherwise i got the error message of not allowed move).
Now i try to disembark with them, but the unit which is already put ashore, and started to work on a mine, still enlisted on the trireme as a carried unit. When i move the trireme away, it just disappears from the hill, and is carried forward by the trireme it already left.
My civ name is 'padisah'. There is only a single trireme,
Probably an update is missing, to disconnect the units from the trireme.