A bothersome fact about 17th Century Dutch ship data

I just received the photographs for pages showing Amsterdam ship specifications, dating from 1655. The bothersome feature is that while they are consistent with what was published by Vreugdenhil in 1938, they differ considerably from lists dating from 1652 and 1653. I knew that this was the case, but the dimensions for many Amsterdam ships are what is different. In one case, the length is shown as five feet shorter (for the Maeght van Enkhuizen).