Man that's a huge bummer. My poor bags are so cluttered now!
I do not see what the problem is here.........
I mean, as you fish just move them into the Hold as you like. They auto-stack when dropped into the hold.
I do not understand why you let them drop onto the deck of your boat at all.
Just fish up until when you get your main pack full, then move them into the Hold, then start fishing again, rinse and repeat.
There is no need at all to let them drop onto the deck of the boat.