Some weird behaviour of Commanded units:
My 3 cultists, attacking from the sea thanks to Water Walking, captured each one unit thanks to Commando. The captured units appeared on the same tile as the cultists, on the sea. Next turn I found the captured units 7 tiles away, on the nearest neutral landtile. I should mention that my land was closer, 6 tiles away and there were unoccupied tiles belonging to the enemy just next to the units.
I don't know what might be the best solution - perhaps temporary water walking?