Edit Menu?

Hello –

First time user of this theme, and working on trying to make something better than Wix for my fledgling band, where.moth+rust.destroy.

Work in progress is at https://www.wheremothandrustdesroy.com

I am having an issue with the menu, for some reason. Seems I cannot edit it. I went to the menu customization, and the only entry is Home, but for some reason, the Photo Gallery link is still present. I am set to use only the secondary menu, because I only want the horizontal at the top.

Any ideas as to why the menu customization seems to not be working for me? Let me know if you need more information in order to help me.

Thanks