In version 1.6.1, when a test is created that contains a package with an overloaded function, and when it's opened in the test builder, Code Tester lists more versions of the function than actually exists.
WORKAROUND:
Manual edits can be made to get the test definition in sync with the changed header, through the Test Editor.
See Help doc "Update Test Definition After Program Changes".
STATUS:
Issue fixed in Quest Code Tester 1.8.0. The latest version of Quest Code Tester can be downloaded here.