If you extend the requirements with custom fields of interest by creating additional stereotypes to incorporate those fields why can't you create those elements specifically with those fields only? Why is it also populating the fields from other stereotypes?
 

Using:
MagicDraw 2022 Rx 1. 

Here are some images:
 

Then even the default requirements element also has these new additional fields:

So clearly the stereotype and generalization isn't accurately being applied otherwise I would expect when creating these new elements to have only the fields inherited from the base extended requirements and the additional properties specified, not the ones also created in the other stereotype. What am I missing? Or what am I doing wrong? If someone could point me in the right direction it would be greatly appreciated.