Some odd armaments on Dutch ships in 1654

I have not seen an explanation for some of the down-gunning of Dutch ships in 1654 that is evident from the Staet van Oorlog te Water for the year 1654. I have wondered if it was because of a gun shortage, as there were new ships to arm, or if it was reduced armament for overseas service. There were also many ships with an odd assortment of guns, as though they were armed with whatever guns could be found. There are some shot weights that seem to have been very non-standard (such as the 14pdr). In any case, these are examples of the phenomena:

Key:
A=Amsterdam
F=Friesland
N=Noorderkwartier
R=Rotterdam
ss=steenstukken
Ad = Admiralty
pr=pounder
Ch.=Chambered gun
SbN=Schout-bij-Nacht (Rear-Admiral)

1654
Ad Ship                  Captain                   Guns Gun List
A  Stavoren              Evert Anthonisz             32 4-24pr,20-12pr,4-8pr,4-6pr drakes
R  Gelderland           Michiel Fransz van den Bergh 40 18-18pr,10-12pr,2-Ch.12pr,6-6pr,
                                                          2-Ch.6pr,2-Ch.4pr
R  Haij, jacht           Jan Jansz Blom              10 6-4pr,4-ss
F  Westergo              Allert Pietersz de Boer     44 2-24pr,12-18pr,12-12pr,10-8pr,8-6pr
A  Stad en Lande         Pieter van Brakel           48 22-18pr,20-8pr,6-6pr drakes
F  Prinses Albertina     Adriaan Bruynsvelt          44 14-18pr,12-12pr,10-8pr,8-6pr
A  Groningen             Gillis Tijssen Campen       34 18-12pr,4-10pr,8-8pr,4-4pr
A  Huis van Jaarsveld    Jan van Campen              32 2-24pr,20-12pr,6-8pr,4-6pr drakes
F  Omlandia              Laurens Degelcamp           30 2-12pr,3-9pr,6-8pr,6-6pr,9-5pr,2-4pr,2-3pr
N  Wapen van Alkmaar     Arent Dircksz               28 4-12pr,14-8pr,6-6pr,4-4pr
R  Gorinchem (Gorcum)    Corstiaen Eldertsz          30 2-15pr,16-12pr,6-6pr,6-5pr
N  Jozua                 Vice-Adm Pieter Florissen   50 4-24pr,18-18pr,10-12pr,10-8pr,4-6pr,4-4pr
R  Utrecht               Leendert Adriaansz Haexwant 22 6-Ch.12pr,10-8pr,2-6pr,4-4pr
N  Prinses Roijaal       Captain Ham                 24 2-18pr,2-14pr,4-12pr,12-8pr,4-6pr
N  Eenhoorn              Jan Jansz Heck              30 7-12pr,2-14pr,4-12pr,12-8pr,4-6pr
N  Kasteel van Medemblik Adriaan Houttuijn           28 10-12pr,8-8pr,6-4pr,2-3pr
A  Vrijheid              Abraham van der Hulst       46 4-24pr,18-18pr,6-12pr,14-8pr,4-6pr drakes
A  Maan                  Hendrik Huyskens            40 4-18pr,16-12pr,16-8pr,4-4pr
R  Dolphijn              Paulus van den Kerckhoff    32 2-Ch.24pr,18-12pr,8-6pr,2-Ch.5pr,2-4pr
R  Prins Willem          Hendrik Jansz de Munnick*   44 4-24pr,10-18pr,12-12pr,10-8pr,8-6pr
R  Prinses Louise        Aert Jansz van Nes          38 4-24pr,20-12pr,10-Ch.12pr,4-Ch.5pr
R  Gelderland            Aert Jansz van Nes          22 2-Ch.12pr,10-8pr,6-6pr,4-4pr
A  Leeuwarden            Jan Egbertsz Ooms           34 4-18pr,14-12pr,14-6pr,2-4pr
F  Oostergo              Rombout van der Parre       52 2-24pr,22-18pr,20-12pr,8-6pr
N  Enkhuizen             Dirk Gerritsz Pomp          28 4-12pr,14-8pr,6-6pr,4-4pr
A  Huis te Zwieten       Vice-Admiral de Ruyter      60 10-24pr,16-18pr,24-12pr,10-6pr drakes
A  Fortuijn, jacht       Pieter Salomonsz            14 14-4pr
A  Vereenigden Provincien Maarten Schaeff            32 4-24pr,14-12pr,10-8pr,4-6pr
A  Zuiderhuis            Dirk Schey                  32 4-18pr,16-12pr,4-10pr,4-8pr,4-6pr drakes
N  Jonge Prins           Cornelis Barentsz Slordt    28 2-24pr,10-12pr,8-8pr,2-5pr,4-4pr,2-2pr
F  Breda                 Captain Stellingwerff       32 6-12pr,10-8pr,12-6pr,4-4pr
A  Vrede                 Isaak Sweers                32 4-24pr,18-12pr,6-8pr,4-6pr drakes
A  Huis te Cruiningen    SbN Cornelis Tromp          54 24-18pr,6-12pr,16-8pr,8-6pr drakes
A  Amsterdam             Jan Gideonsz Verburgh       50 22-18pr,10-12pr,12-8pr,6-6pr drakes
R  Rotterdam             Jan Aertsz Verhaeff         30 2-Ch.24pr,18-18pr,8-8pr,2-Ch.4pr
A  Landman               Dirk Quirijnen Verveen      44 4-24pr,24-12pr,12-8pr,4-6pr drakes
R  Overijssel            Dirk Vijch                  22 4-Ch.24pr,2-12pr,4-8pr,12-6pr
R  Eendracht             Lt-Admiral van Wassenaer    58 16-24pr,12-12pr,20-8pr,10-6pr drakes
A  Huis te Oosterwijk    Gideon de Wildt             56 24-18pr,24-12pr,8-6pr drakes
R  Brederode             Witte Cornelisz de With     54 4-Ch.36pr,12-24pr,8-18pr,20-12pr,10-Ch.6pr
A  Campen                Willem van der Zaan         42 4-18pr,22-12pr,10-8pr,4-6pr drakes