Page Title in SERPS is older than cached page

cache shows different page to supplemental result

[glitterball]

I have noticed that the page titles displayed in Google results are not the same as Google's cache of the same page on some supplemental results.
i.e. The cache is much more recent than the results.

Why does this occur?

[tedster]

Google's data set is really huge and they use several hundred thousand servers to process everything and then to piece together the final SERP from different internal resources. With that amount of data dancing around, the various pieces of the search results are not always in synch.

[glitterball]

Yeah, looks like that's all that is going on.
I'm now seeing the previous situation reversed - the page titles are now newer than the cache.

Still, seems to take a long time to process a page (several days since I noticed this).