Sub Menu content is being duplicated

I was using the same page name for both.

You can see in this snippet that I used “BCRM” and I didn’t realize it.

add_submenu_page( __FILE__, 'BCRM Customer Settings', 'Customer Settings',
    'administrator', '**BCRM**', 'bcrm_customer_settings_page');
add_submenu_page( __FILE__, 'BCRM Form Settings', 'Form Settings',
    'administrator', '**BCRM**', 'bcrm_form_settings_page');

I changed them to BCRM_customers and BCRM_forms respectively and it is now 100% functional.

This was a silly mistake that came from not carefully reading. If you see duplications, check for duplicate page names.