Another look at the 30 June 1652 Dutch fleet list

I was looking again at the published Dutch fleet list dated 30 June 1652 that Carl Stapel had passed to me several years ago. The good thing about the list is that it shows the fleet organization and all but two of the ships can be identified by the captains' names. But while the list is dated 30 June, there are some anomolies. By 30 June, Adriaan de Zeeuw had been killed and Sijmon Cornelisz van der Meer's ship had been sunk in action with English frigates. Also, I believe that Jan Warnaertsz Capelman's ship had been captured. All those, however, are included in this list. It clearly represents the fleet sometime earlier in June, or else it was what had been planned. Clearly, the list is accurate, so why the two names who are so unfamiliar: Jacob van Nove and Jan Elbertsz van Enkhuizen?