You have five different 8GB "Grand Piano" libraries. You forgot you installed three of them. A better manager shows you a visual map of disk usage per library.
Setting Up a Third-Party Kontakt Library - Native Instruments Support klm30doubleykontaktlibrarymanager better
Could you clarify:
: Using tools like KLM to force custom libraries into Kontakt Player may violate Native Instruments' terms and conditions You have five different 8GB "Grand Piano" libraries