I opened that sheet and saved it and now the correct date/time is displayed. The document was actually last updated on September 19th. Looking in my 'Pinned' section though, the 2nd sheet down is a document that gets updated regularly - and yet the date/time shows as August 7th. 'Yesterday' shows the only other spreadsheet I worked on yesterday and 'This week' shows a file I created on Tuesday. I opened a file from my network share (U drive is mapped to a networked file store) which you can see listed under 'Today' alongside a local file IO have been working on this week. When I reverted back to the original key, I see this:
