Reply To: How to add multiple custom fields to the admin “manage” page?

Add all fields to the same meta box instead of separate meta boxes. Do this by adding all the fields to the fields key in the array.

Here’s a link to a complex example. The highlighted section show two radio groups registered to a single meta box:

• https://github.com/Connections-Business-Directory/Custom-Metaboxes-And-Fields/blob/master/cn-metabox-field-demo.php#L146-L172

I hope this helps!