This person is written in IMLSP as "Steinacker, Karl"
The composer is born as "Carl Steinacker" 1785 in Leipzig and died 18.1.1815
Please look at Personennamendatei der deutschen Bibliotheken
http://d-nb.info/gnd/141080132
The name is called with "C", former catalogs in German and Austrian libraries used "K" for "C" in prenoms, therefore the wrong writing in MusikSack and other elder dictionaries.
GND is the leading authority for names for librarians; the death of Carl Steinacker was 18.1.1815, not 18.12.1814; Please change the site of him.