Was this a Bug? Adjusted Crawl Numbers

Not sure what to make of this. Yesterday I saw a doubling of the Google crawl rates on one of my site, as mentioned in the post Google-Bot going crazy. Today, I see an adjusted crawl rate, and updated with the newest data for this site. However, what happened with the earlier reported numbers of crawls? Pay extra attention to the scales below!

Yesterday:

Today:

crawlrates-today

So what happened to the high number of crawls from the day before? Given the amount of flux going on in the G index, this smells fishy! BTW, this is consistent across different sites, different Google webmaster accounts, and different regions.