All of white's moves seem pretty natural in the first game
Too many cheaters in Live tournament!

Natural moves for a player with Blitz rating 1343 and Tactics 1407? By the way he played all these moves in 3 minutes of time!

In the second game, occassionally you can get disconnected and the client does not reflect it. In such a case, it looks like your opponent stops moving and when the game finally times out, you lose because you got disconnected.

Discussions of cheating and/or how Chess.com deals with the issue are not allowed in the general forums. If you would like to discuss that, join the following group:
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And check out the following.
https://support.chess.com/customer/en/portal/articles/1444879-fair-play-on-chess-com-what-you-need-to-know.
Marcus - MOD
Dear chess friends,
I've noticed there are too many cheaters playing in Live Tournament. The atraction of some nice badges on profile can make people start cheating with software.
Very frequently, players with rating Rapid 1500 play just like Carlsen in his best day.
Here is my last game against a 1500s opponent, the post match computer analysis show out that he played with 99,99% accuracy in a very complicated Sicilian Paulsen variation!