Help me out here

[dashstofsk]

Then we have the VM, no author, no key, no meaningful link between sections.

Indeed, there is a lot that we don't understand about the manuscript. No one topic, variable quality of illustrations, variability in language and writing, general untidiness.

It strongly suggests to me that the manuscript was not written in one go. That each section was written to be a separate piece of work and that the sections were then later bound into one volume. Bound together for the convenience of having all works in the unknown writing in one manuscript.