A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data
In typical me fashion I posted before following back up with my users today. They have now reported that it hasn't happened today so far. Maybe I fixed it
To follow up with Shawn's comment, I hadn't thought about if the notifications were being triggered by subsequent updates to a list item. My initial thought would be no, but I can't conclusively say that; as one user reported getting 76 notifications after hours and no one in our business would be updating list items over night... or at least not that much.