The Modern Forgery Hypothesis

[proto57]

The wax on the inside would then be to keep it flat, tidy and manageable.

That would be an extremely unusual use of seal wax.   And besides seal wax is not supposed to be sticky when cold.
All the best, --stolfi

So would using warm seal wax and squeezing together two pieces of paper stick the two pages together? Whether its unusual or not, the marks line up nicely as if it was used that way. The fact that the wax "fills in the circle" when overlayed points to it being the case, in my opinion.  
   

Also, this is a good time for me to ask, what makes wax a seal wax? Is it a special type of wax (and is this wax clearly seal wax?)

That's very interesting. I mean, your picture showing a possible match or mating of the seal remnants.

Edit to add your pic again, and from Wikipedia:

"Formulas vary, but there was a major shift after European trade with the Indies opened. In the Middle Ages, sealing wax was typically made of beeswax and "Venice turpentine", a greenish-yellow resinous extract of the European larch tree. The earliest wax of this kind was uncoloured. Later the wax was coloured red with vermilion."