I’m not sure I follow. You’re using the Relation field using Small Businesses are your primary Field and on your other 3 post types it’s just repeating the same small business title multiple times?
Maybe it would be easier for the explanation to simplify this ti Post Type A and Post Type B and describing what field you’re using, what settings you’re using for the field, what is happening and what you expect to happen.
The above may make it easier for those here helping to replicate the issue and give you the best advice on how to proceed.
