Some different gun figures for Dutch ships in September 1653

I have a page that I received yesterday that has some rather unusual gun numbers for Dutch ships in September 1653:

Adm   Ship      Stated guns Usual guns  Captain
A     Samson    24          26          Hendrick Adriaenszoon
A     Pelicaen  28          24          Jan Overcamp 
                  (the Pelicaen carried 24 guns on 14 July 1653)
A     Brack     20          18          Poppe Binckes
A     Hoop      24          28          Dirck Pater
A-Dir Samson    26          28          Cornelis de Groot