This update happened on my machine on the 6th of December (yesterday). As a result SPFLite shows a sbeing installed yesterday. Probably nothing to worry about ecept regarding the (lack of) care MS take.
A while back, I think it was when Win10 did its last major update, I noticed the install date of all my programs were altered. I use Revo Uninstaller Pro, and it used to split off the 'recently installed programs' from the rest of them. After that update, there was no separation of programs as they all had the same date.
I just checked right now, and I have no programs installed prior to Nov 15/2015, which is blatantly incorrect.
As well, after that update, some of my programs acted as though they had never been activated before and I had to re-enter registration codes etc.
MS obviously has royally mucked up the Registry in a whole bunch of areas.
As you said, very, very sloppy of them.
I've not researched the problem at all as it really isn't a major problem. If you do, and find anything out, please post it here.