I never export my games to the same folder twice. At least, I delete the export content and do it all over again... and so should you, I think.
I have done this and still the 1st exported copy gets exported,
I have closed and rebooted the programs, even deleted folders off the server and reloaded with the new folder, still the same,
I have open the index.html of the exported in notepad and copied that into a server file and the same result, this leads me to believe that the error is in construct2 source not exporting/overwriting the changes ,
I have installed 173 again and running that from a flash drive and the same is still happening.