sysadmin update not recognizing available distro updates

noticing on multiple systems - freepbx and pbxact - that sysadmin via web GUI or command line doesnt recognize available updates ..

10-13.66-15 should be available as the latest update

[root@jrlg ~]# sysadmin_update_system 
Array
(
    [status] => error
    [data] => SimpleXMLElement Object
        (
            [0] => This system is up to date.
        )

)
[root@jrlg ~]# cat /etc/schmooze/pbx-version 
10.13.66-14