Odd armaments for Dutch warships in May to July 1653

From Witte de With's journal during May to July 1653, I had seen some odd armaments for ships such as the Bommel. The Bommel, then commanded by Pieter van Braeckel, was listed as carrying 34 guns. Jan van Campen's ship, the Overijssel, was listed as carrying 30 guns. The best list from published sources is that in The First Dutch War, Vol.IV, starting on page 308. That list, dating from about March 1653 gives the Bommel as carrying 30 guns and having a crew of 100 men. The Overissel is listed as having 28 guns and a crew of 100 men. This list from 14 July 1653 lists the guns for the Bommel with 34 guns and the Overijssel with 30 guns, so those are good figures. By the way, the Overijssel, like the lost Gelderland, had a main battery of 10pdr guns, at this date. The Gelderland, lost at the Battle of the Gabbard, or Nieuwpoort, was commanded by Cornelis van Velsen.