[split] What can the structural peculiarities of the VMS tell us about the nature of the underlying text

[MarcoP]

2. why several line start word types are rarely seen in the middle of the row (we can see why they won't be at Line End but why not elsewhere?)

In particular, it's interesting that line-start words contain bigrams (like You are not allowed to view links. Register or Login to view.) that are quite rare elsewhere.

You are not allowed to view links. Register or Login to view. was that "there could be a process which adds [y, d] to words beginning [ch, sh] when they are in a linestart position". 

It's unclear that Voynichese is a cipher, so we don't know if there is an underlying text. Personally, I doubt that properties like this could derive from the hypothetical underlying text.