Hi Garmin-User, 
per [Country_specific_values](https://wiki.openstreetmap.org/wiki/Tag:boundary%3Dadministrative#Country_specific_values_%E2%80%8B%E2%80%8Bof_the_key_admin_level=*) there should not be admin_level=9 in Armenia, and Yerevan districts should be admin_level=5. I agree that these districts are not the same as municipalities but are having administration which is under City of Yerevan so I do not thing your change here is correct. 