load configuration fails

Hi,

Can you please help me on this load configuration scenario...OTM VER 6.2.10

1: Smaller size ship unit can not be stacked on bigger one. Only staking criteria is if length and width is same for both the ship units

2: maximum weight stacking criteria is not working for non similar ship units as well
maximum stacking weight limit = 100kg
I have taken 10 ship unit each 50kg. In this case system should stack 2 level (50+50)


Kunal