Hi Jim.
All the changes on menus (every time you add a new module or a new version or you are developing and add a new feature) are registrered on the corresponding menu table, but the systems reads the menu-cache table instead, that's why it has to rebuilt since it doesn't reflect recent changes. Just in case you don't know.
The second issue, I don't know, but maybe it's just a question of selecting USA as your country and everything will work properly 
