Not entirely sure how you mean here.
The mobile menu works in this way: It looks exactly the same as the header menu, but at 719px width, it replaces the header menu links. If you do not use the mobile menu, the header menu will be active for all screen widths.
The theme only has one menu in the header active at one time, so you can’t get 2x menus to display at once.
Once you purchase a product from alx.media, you will receive an account and access to the support forums.