Hello,
It is recommended to run import on a fresh WordPress installation. For this you can use WordPress Database Reset plugin https://wordpress.org/plugins/wordpress-database-reset/ The plugin can be used to remove all the existing content and install a new version from scratch.
The header is different because Multiple headers are used, go to Theme Options > Header builder > Multiple headers > edit custom Header for the Home page, here is a video about Multiple headers – https://youtu.be/BpeXfzNwkOc
About the Footer, provide temporary wp-admin access, so we can take a closer look at your settings.
Create an account via Dashboard (Users > Add new) with administrator role http://prntscr.com/s3rc9m > provide us with username and password via the Private Content area http://prntscr.com/s5mao7 You can use any email for it.
Regards