Template assigments: bug or misunderstanding ?

Hi people,
I am working on a fresh new website powered by Wordpress (latest), Woocommerce (latest) and DIVI (latest) with a DIVI child theme. I have some troubles with DIVI's templates assignment logic. Here is the setup at the moment :

On the Woocommerce side of the project, products are organized in categories like this :

• Products (the default cat., not used but mandatory)
• AAA
⊦ AAA_subcat_1
⊦ AAA_subcat_2
⊦ (...)
• BBB
⊦ BBB_subcat_1
⊦ BBB_subcat_2
⊦ (...)
• CCC
⊦ CCC_subcat_1
⊦ CCC_subcat_2
⊦ (...)

On the DIVI theme builder side of the project :

Template AAA_TPL
Used on : Specific Product Category Pages > AAA
Excluded from : -

Template BBB_TPL
Used on : Specific Product Category Pages > BBB
Excluded from : -

Template CCC_TPL
Used on : Specific Product Category Pages > CCC
Excluded from : -

Template GLOBAL_TPL
Used on : All Product Category Pages, All Product Tag Pages
Excluded from : Specific Product Category Pages > AAA, BBB, CCC

What is expected :
All Woocommerce taxonomy archive pages use GLOBAL_TPL except the archive pages of AAA, BBB and CCC categories which should use their own template (AAA_TPL, BBB_TPL, CCC_TPL).

What is really happening :
All product tag pages are using GLOBAL_TPL --> OK.
AAA, BBB, CCC archive page are using respectively AAA_TPL, BBB_TPL, CCC_TPL templates --> OK.
AAA_subcat_1, AAA_subcat_2, etc. are also using AAA_TPL wich is NOT OK.
Same for BBB_subcats, CCC_subcats --> NOT OK.

Do I miss something on how DIVI's template assignment works or is it a bug ?

PS: I made it work AAA the way it was expected with this configuration, but it sounds crazy to do this.

Template AAA_TPL
Used on : Specific Product Category Pages > AAA
Excluded from : Specific Product Category Pages > "All categories except AAA"

 

DIVI support confirmed this is the intended behavior, so, unless a bunch of php code to override this, I'm condamned to this workaround. Anyway, I still don't understand why DIVI developers don't respect the logic of the template hierarchy where when you create a specific template (say based on slug, for example), it is only used by the category which have this unique slug.