Most likely, this is problem with the Windows OS running on the client side. Samba time is accurate, Windows isn't due to daylight time changes. More details here:
http://samba.anu.edu.au/rsync/daylight-savings.html
Workarounds:
- Ignore time changes smaller than 1 hour in the sync utility (not suitable for critical applications)
- Use a linux client with a VM or co/andLinux to sync the folders (requires extra system resources, but a lightweight Linux flavor
can be adopted)- Disable DST in Windows.