Why are there "Voynichese" words mixed in?

[ololololo]

As if the scribe changed his mind while writing them.

It may be that the Latin text was written simply as such, without the intention of copying the lost text of the manuscript. For even if he tried to restore the text, I do not understand why crosses were needed between the words, and how exactly this text was "corrected" (the author wrote in Latin, but left the Voynichese d at the end of the word oladaba). 
Also, if you look closely, you can see the remains of text on the Voynichese above the word maria. There is also something visible on the top. It is unclear why the restorer wrote between the lines.

An exception is You are not allowed to view links. Register or Login to view. with the nymph, goat and whatever the thing on top is, as this quire contains no further imagery aside from stars.

The drawings may have been made by a restorer, because they are too small and do not resemble the author's style (especially the nymph, as you pointed out).