Rankings Lost For The Second Time

Hi,

I have a website which index page suddenly lost all of its rankings, it was only ranking with the internal pages. After 3 months (a few days ago) it went back, recovering all of its rankings.

Yesterday it lost his rankings again, exactly the way it was before, do you think this is due to a roll back? I’ve heard there was a problem with Google’s algorythm yesterday maybe they backep up their data?

Does anyone knows what could have happened?

Thanks!,
Carlos.