1- Click on your username in white, on the left.
2- Click on "Click here to change your account details and preferences"
3- Go under the "Your Preferences tab"
4- You should see a bunch grey sections, the 4th is called "Game" click on the little arrow.
5- Select "No random" and press validate.
You should be done with that problem. The fact that it doesn't happen to you is completely random.
The only time where you would have to face it, is when you are in Death Match and the majority have it on the random setting.