WM - Confirmation in TO

Hi,

I have a question concerning the possibility to change the destination storage bin when confirming the TO.

I put that "Storage bin can be changed" for all the storage types in Customizing when confirming the TO.

However, while creating a TO with one material taken from one storage type, some of the destination bins can be changed, and others cannot (they belong to the same destination storage type).

I really don't understand what is going on... Does someone have an idea ?

Thank you for your help.

Remi