If you make the last ship give up in a combat it will automatically dismantled. Maybe you should change this if the mission is to capture ships and thats the one missing for success...
how to use bugs: you need 3 areas. click move, enter a letter in the units imput, after that both areas have NaN units. now click move again and select the 3th area, enter any number u want in the imput and the 3th area will have it