As discussed a few years ago. We agreed to trim the package moves updates to maintain 4 years history active in the tree. It currently still goes back to include 2010. There was a recent edit to a 2010 file that triggered a full re-processing of those files. Last night for me it was triggered again. I don't know the cause, but I really don't care enough to investigate. But it prompted bug 576752.
That said, being 2016, I am going to trim 2010 and 2011 files from the active tree in 48 hours unless anyone shows a valid and justifiable reason to keep them. Unlike last time which I made the trimmed update files available for download. With the tree now being git based. They will be easily available in the git history. Thank you -- Brian Dolbec <dolsen>