Hello,
Take our apologies for the delay in answering.
1), 2) Probably 2 tokens were generated. You can remove one of them.
3) No, you don’t need “#” before the tag.
4) Home page and Instagram Wall are 2 different pages. So, if you want to edit Instagram from the Home page then edit the home page and Instagram element on the home page. If you want to include a separate page into your menu that will display the Instagram element only then use the Instagram Wall and add this page to your menu. If you don’t need that page then just remove it to avoid mix-up.
5) Could you, please, log in to your Instagram account here https://www.miraqorgifts.com/wp-admin/admin.php?page=sb-instagram-feed to test the gallery preview issue? And provide us with FTP access to your site to check the issue with the likes.
Regards