Found this thread from 2018 where someone else had some Date Added issues, which makes me think its way more likely my issues are stemming from updating the Synology server time than the update 
Though that user’s issues were for different platforms, reading some of the comments from @ChuckPa and @OttoKerner were helpful for me in trying to understand how PMS ascertains (at least) Date Added data:
“PMS doesn’t go by the file or directory date. It goes by the date it was scanned and added to PMS.”
Which makes me wonder if changing the server back to the time zone it was in would “fix” the problems, as PMS would parse the timestamps it generated for Date Added properly (since that’s what the server time was in when they were added)
But as for trying to figure out how the server time may impact other time data like Recently Played, and the logging times, towards the main goal of trying to ascertain how I may be able to recover from this, I am sadly at a loss.
Any assistance from the mods would be greatly appreciated.
