Link Business Drop Down Selection Not Found

Hi,

I have linked 2 CPT up. When trying to select the linked listing from the dropdownlist, found that the dropdwnlist does not retrieve all of the linked listings.

I have 43 linked listings, but somehow it only shows some.

For example, there is an institution called University of Sydney.

When trying to link “University of Sydney” to its course “Bachelor of Art”, the dropdownlist does not give me “University of Sydney”

Please note that im administrator and should be able to link up any. Also all the listings are created by me.

Hope you can help here, thanks heaps !