No prompt to overwrite files

This just started happening out of the clear blu sky, working well all the time being asked if overwrite files on server,, just uploaded a few files and the files were overwritten without prompting..

Closed and restarted sftp (few times) and check my prefrences which are set to prompt ... same result .. not being asked ... any ideas why this prog would just choose to not prompt when its being told to prompt??

Win98SE with no strange funky running apps ..

Strange.. seems like after I rebooted it started back to work as it should.. and when I checked the file on the server it wasnt the new version that I was trying to upload...

Well, sftp was going through all the motions of uploading the file (without prompting) and giving the transfer complete signal when done, audible as well as printed,.

I did notice though that the upload seemed faster than it would normally take, like almost instant... bug or feature?/