(adsbygoogle = window.adsbygoogle || []).push({}); So I was playing World at War and I played it for 10 straight hours and was at rank 44. So then I went for breakfast and came back half an hour later and am rank 33.

What should I do. Contact activision or treyarch?

I think somebody also posted a thread like this. He said he was lvl 22 and as he came back he was lvl 17.
Wait for the next patch or contact activision or treyarch