“You are correct, whether you read the article or not.”
Not according to the article.
Having lived in Sweden off and on for years, I have been to the museum many times. I have a number of books about the Vasa.
If you look closely at pictures of the ship, you can obviously see the added on gun deck level. It is widely written about that the king wanted another gun deck level due to rapidly changing warship technology.
https://faculty.up.edu/lulay/failure/vasacasestudy.pdf
The above link explains the changes in specifications made by King Gustavus Adolphus over the course of construction. This aligns with the presentations, books and displays at the museum.
Wikipedia also does not completely explain the changes made to the Vasa, compared to the explanations provided in the museum. I believe the author of the article used Wiki as their source material rather than the more scientific explanations.