------------------
1) This is the cargo hold of the Corsair. As you can see, there are 6 grid section on the floor, of 12scu each.
2) This is what the cargo loaded in the ship should look like according to the grid design:
3) This is instead, the max the snapable grid is actually capable of:

What happened
-------------
As you can see, you can snap only a 24scu container, that leave 12 scu of space empty (2 behind and 8 front), where you cannot snap cargo.
Also, the snapable grid is not even centered.
Here a comparison with the inteded design:

What should have happened
-------------------------
Using the grid design on the floor, which seems to be the intended one, the Corsair should hold 108scu in three row.

Workaround
----------
Put cargo off grid