The same issue occurs if I try the full title as well.
Why aren't I given a choice that includes all 6?
I count seven....
[:D]
Go and try typing CCEPONT in your library, and you will see there are no results. This is because there isn't any resource short title set for these resources. The "CCEPONT" title shows up there for display purposes (and is searchable within that popup), but isn't indexed with the other metadata in the library. You can fix this by setting this a the short title for these resources in your library.