Every file upload writes over the first file uploaded?

I am TOTALLY new to WinSCP and am trying to figure it out - however, once I successfully upload my first file into my stock folder, every subsequent file I attempt to add to that folder becomes the ONLY file in that folder. It overwrites the first file! I have changed no settings, I literally logged in, located the file I want to upload, when the upload screen appears, I have changed NO settings, hit OK, and the file gets overwritten.

WHAT AM I DOING WRONG???????????

Please email any help to carrieaulelnbacher@gmail.com

Please attach a full session log file showing the problem (using the latest version of WinSCP).


Though I'm pretty sure this has nothing to do with WinSCP.
Isn't it rather that the server processes a file after it is uploaded and removes it from the folder?
And it's only after you upload another file that WinSCP refreshes the folder and finds out the previous file is not there anymore?
Can you try to refresh the folder manually shortly after an upload to check if the uploaded file indeed disappears?