I am now running the WinSCP 5.7.7 (Build 6257) on Windows 10, and using SCP.
If I drag and drop files within the UI, the timestamps show with MINUTE precision., eg. 20/04/2016 12:01. When I run Keep Remote Directory Up To Date the first time I save (change) a file on the local machine, the file synchronises, but then the precision drops to DAY, eg. 20/04/2016. So no subsequent updates the same day will trigger an update. All I get is "Change in 'C:\.....' detected.
Although I've looked at the documentation, and can't for the life of me find a solution to this problem. Please help as this is driving me nuts.