The problem appears to be that the first 29 scans use a hyphen to separate their job designation title of "HAP" from their assigned page order number, appearing as HAP-01, HAP-02, etc. This would be fine, but scans 30 to 52 eliminated the hyphen. This inconsistency reveals that the old CDisplay program was written to ignore the hyphen character (and possibly any other non-alpha-numeric entry) while the newer CDisplayEx program correctly views it as a sortable character. Who knew?!