Order Edit Problem

Dear Members,

I have a product TATARA HOME with options A, B, C, D and so on, the customer has ordered this product using option A

we are trying to do upsell and the customer has agreed to buy one more TATARA HOME but with option B

Now when we are trying to edit the order in the backend and trying to add TATARA HOME with option B

It does not let us choose option B and it adds TATARA HOME with option A as 2nd quantity automatically in the existing order. so the customer's original order becomes 2 quantities of option A instead of option A and option B each

In other words, how can I add the same product in the existing order but with the different option

Do you see hamburger button which shows section with options?

http://prntscr.com/kr6v10

Do you see hamburger button which shows section with options?

http://prntscr.com/kr6v10

Ok let's say, I want to add the same product in the same order with large size too? how will the happen?

Ok let's say, I want to add the same product in the same order with large size too? how will the happen?

Just tested. Yes, it is required to save order after each product is added