What happens if I have manually adjusted load lists, and then change the component allocation QTY for a product?

What happens if I have manually adjusted a load list, and then change the component allocation QTY for a product?

This is what happens.

1. You have manually adjusted a load list. How to do this.
2. You have then changed the components allocated to a product. How to do this.
3. The load list will recalculate based on the new component allocation. 
4. The original load list adjustment will remain, and adjust the load list via the original (plus/minus) adjustment.