Same in my case
Why did my ranking jump over 100 points?

Same in my case
I have the same problem. from 1160 to 1315.Besides, while playing I'm listening an advertisment about how I can teach a dog to shake hands

Thanks guys. Im glad Im not crazy. Ive never seen an add that made noise. That would be annoying. I feel bad that I didnt earn the points but it looks cool. I feel smarter already. Ive heard chess.com is roughly 200 points lower than someone actual rating. Maybe they are trying to fix it.
I have the same question. My rating was 1638 when I logged off last night and was 1938 - give or take a point - when I next logged on this evening. What happened?
Just did a search and found out chess.com did this because the ratings were too low. Basically, there weren't enough points in the system to accurately rate players.
I assume the thought is the points will be distributed to those who deserve them as we play.

Hey, guys! Just a bit more info. You're right, the rating increases in standard are not in error.
http://www.chess.com/forum/view/livechess/standard-ratings-boost?page=1
This is occuring for every player, so the level of your opponents will not increase. We are doing this because we had a deflation issue with standard ratings (and only the standard). With the increased rating, your score is more accurately reflected when compared with the rest of the site. I don't know about you, but playing a 1750 NM just doesn't make sense to me :D
There were also some very steep climbs because the rating pool was "squished" so the new rating pool should more accurately reflect your skill increases.
If you have any questions about this, feel free to drop us a line:
So I have played thousands of games so my points shouldnt have jumped that much. I was rated about 1420 on my standard time and when I sat down today to play a slow game I was rated 1565? Ive never broken 1500. Did they change the ranking or something? I noticed one of my friends was ranked unusually high too.