On a new install I am using the Scholar theme (with my own

On a new install I am using the Scholar theme (with my own child theme - no edits yet) with BuddyPress and something strange is happening with the menu.

1. I have created a custom menu and it says that the theme supports one menu, so I selected it. As well as my custom menu items the site displays a "Community" drop down (for BuddyPress) and a "Category" dropdown with post categories. I would probably have added these myself anyway but curious to know how they got there and if they can be removed.

2. In addition to the "extras" on my custom menu there is an automatically palced "Home" option. Unfortunately this link has assumed that my WordPress URL and Site Address URL are the same, which they aren't; if I click the Home menu option I get a 404 error as it is looking for mydomain.com/worpdress instead of mydomain.com

Many thanks for any advice/fixes.

Ian.