After experiencing the trauma of the Google "MayDay" update, and checking everyday a way to improve my site, I observed that the Google index is removing and additing pages.

It seems like the Google team is trying to adjust or correct the new algorithm.

IMO it is excessive to see 300 pages indexed and removed from my competitors who have much more pages than my site.

My question is simple: Do you think they screw up their index with the new algorithm?