Stock update problem

Hi Kevin,

I was super happy when I found your plugin, it is so useful in our case!

I have a problem though. We have a product (lets call it “A”) which is dependent on two other products (lets call it “B”) (same product just two pieces of that).

When I purchase product “A” the stock is reduced for product “B”, which is good.
But when I set the order status “cancelled” the stock is increased for product “A” and not product “B”, which is obviously not good as it should modify the same stock what was used originally when the order was created.

How can I make it work that way?