Cheating on time

I would really like to know why is the computer cheation on time. I 'll give an example, which happened to me not once, but several times. The speed 2 min.game is before its conclusion. Material is even, nobody could go ahead. My time shows 35 the other player has only 20 sec. Suddenly the computer starts giving more and more time to my opponent. It goes so absurd that he finishes his "victory" with almost one minute to spare. As the game goes on, the computer goes virtually backwards calculating his time up instead of down. I don't dwell on the results too much, because 2 minutes game just isn't a serious chess, but I really wonder, why it goes like that. Why are certain players preffered? It's definitely not a fair play and it's certainly against the rules.

@OP: This sounds simply like Fischer time, in which both players are granted a time bonus after making every move. Your last several games in Live Chess were 2|1, which means both players get two minutes for the whole game, in addition to one extra second after every move.

If your opponent was taking less than one second to move consistently, then he would actually gain time.

This is not cheating; this is fair because both players have the potential to do this.

You probably already know this, so I don't mean to insult your intelligence, but if you don't, I am surprised, because you have completed thousands of games in almost three years on the site. Have you never encountered Fischer time before?

Probably to do with time lag of their connection. There is something on this in chess.coms FAQ. Computers haven't developed their artificial intelligence to a point yet that allows them such motives of cheating and preference of certain humans over others.

Judging by your recent game history, you were probably playing a 2 min game with 1 sec increment.  Your opponent must have been using premoves, which should explain your "backwards clock" phenomenon.

You've been on chess.com for nearly 3 years, so I find it a bit hard to believe that this never occured to you.

I hate bonus time, I mean when I was going to run one of my opponents out of time and he had 1 second he moved and gained 1 minute and 59 seconds and then I didn't get any extra time.

Lag compensation wouldn't add time to the player's cache.

Yesterday, I saw two players playing 1|0 bullet chess. One player had a much better connection than the other. White was able to move without much lag, but Black experienced something like the following:

Black had 3.8 seconds. White moved, resuming Black's clock. Black moved at 2.4 seconds left, but the clock suddenly changed to 3.5 seconds. White quickly moved again, and Black's clock drained to 1.2 seconds. When Black's next move registered, Black's clock suddenly read 3.4 seconds. Et cetera.

Black was being compensated for lag, but his clock didn't actually increase.

@kana01: The "bonus" time in Fischer time always applies to both players. One player cannot possibly gain time without the other player having the opportunity to do the same.

The bonus time (or "increment," as it's called) is designed to help prevent either player from losing on time. If you want to run opponents out of time, then you should play without that increment. 

This happened to me in 2|1 - what is the deal i moved and the player gained 10 seconds. then i moved again and they gained another 5. I understand how they gain 1 - but why 10 or 20? I had 43 seconds they had 3. I moved they suddenly had 13, I moved they had 18 - why does that happen. Thought they could get 1  a move. What DONT I understand about 2|1? If it were backward clock they would get 1 per move - no?

How do i check how many times i have played with the same opponent