In the case of an amendment, on a sales line containing a product kit, its list of components is not updated with the new list. In the case where the amendment is made to update the list of components of the kit because it has been modified (case of error or omission)
What do you think ? is it a bug?
In draft there are no components so they are updated when quoted.
In other case, changing the components is like changing the product kit so you just have to change the product for itself by setting quantity to minimal and add a new line with the remainder quantity.
In the amendments of sale it is possible to add a line to the sale?
No you just make a new sale with the line.