about pages out of order

[februs]

in summary,

the original creators bound VM in order →VM was damaged by water → part of order was wrong during rebinding 

is it right?

then I have two question.

1. why do you think VM was damaged by water?
    can you see by VM states?

2. you say VM's folio numbers was written after rebinding.
   if it is right, could the numbers be different  from the original?
   how did rebinders figure out the correct order?