I am still checking to find out what can cause the issue with the menu, not quite sure.
Tried on my local to install the demo and order the menu items as you did, but same, its working on my side.
Also for the side panel, its working without issues on your page.
Checking for it further will advise you asap.
Can you please advise if you had that issue before on previous templates.
Also please try to download some other template and install it assign it as default and check if the menu will work. Please make a backup first.
Kindness costs the least, but is worth the most!