How Can This Happen? Please Explain

Hi there guys

There have been several weird things going on with my site but the most recent is something that happened with Google Cache date.

I check it on a regular basis to see how often my site is crawled. A few days ago, there was a crawl on June 14. Now when I check, it says June 3.

How is this even possible.

I check cache age by typing in my domain name in Google search and then clicking on the cached version option below the search result.

maybe the results came from a different data centre :\

hmmm..could be I guess - It has never happened in the 6 months or so in which I have been constantly checking the cache age just to see if Google likes my site.

I have noticed that shitty sites get crawls ever 20+ days while good sites get crawls every 0-5 days. Mine was in the 4 day range and was doing well in this aspect until Google pulled this stunt on me.