Uploading index.html

I am very very new in SmartFTP and my question is very simple. I've uploaded four different files to as index.html and I click overwrite, everytime.

And now, I have four different index.es in four different addresses.
One address is http://domainname.com/mysitename/

Another one is http://mysitename/domainnam.com

Another one is http://domainname.com/mysitename//

and now, there's this latest addition

http://domainname.com/mysitename///

By right, there should be only two which is http://mysitename/domainnam.com and http://domainname.com/mysitename/.

What does Overwrite, Resume, Abort and Skip really do in here?

Overwrite: replaces the remote file with the file you are uploading, if it has the same filename.

Skip: skips the file for uploading and leaves the remote file the way it is

Abort: completely cancels all uploads in the thread

Resume: Um...to be honest, I'm not 100% sure about this one, as I never use it.