This last one is the most interesting :o) but they won't let it know to the public.
Ptkay, re the additional person in the pilot cabin on the ground discovered - only rumours level on the Russian side as well. There is a dacha owner nearby who saw way too much in that flight cabin REPORTEDLY - but the way rumours went the Smolensk blog thinks it's all over-inflated to enormous degrees.
First he "saw a man", then he "saw 2 men", then he saw even the straps by which they were held in their chairs - and all this "through the cabin window".
While nobody so far saw the cabin itself!
so much it got destroyed.
What most people take for the "cabin" - that's end of the tail, in all the photos.