The first game was drawn by insufficient material. The moves Ke5 and Ke4 are mistaken, because when a game finished, the arbiter puts the kings in the center of the board to show the result. Kings on their own color = draw, which is what happened. The electronic board probably thought these were game moves.
The second game was also drawn by insufficient material, same situation (KBvKN).
There is sufficient material in both games. Insufficient material happens only if one more piece is taken.
did you want them to play on in that position?
#3 is technically correct, but it was insufficient material in a general term, I suppose. I doubt the players would have liked if STL barred them from drawing from that position.
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