I'm using Globalscape Secure FTP Server 2.0 on the server and use several clients to connect to the server with SFTP. WS_FTP Pro 8.0 also has this problem, but Cute FTP pro 6.0 and PSFTP 0.55 don't.
I have had this problem with every version of WinSCP I used up to the current one 3.6.8. I'm only using SFTP/SSH2 to connect to the server. The client is setup in Norton Commander style.
I can send you screenshots, if you need more information.
I came to the forum to report the same problem. I copied a few files from my Windows 2000 machine to my linux box and it showed the same date/time as windows for teh file, but when I read the file date/time with my application some files were one hour off (some files were one hour young then the windows ones). I then tried another tool, the SSH client from www.ssh.com
and it showed me the "wrong" date/time I am getting with my application. So I copied the files with the SSH tool and the date was the same as on windows and my application also gave me the windows date/time so they matched.
It seems like WinSCP is copying the files, modifying the date stamp and showing a wrong one (although it would be "right", if it wouldn' the wrong one).