Duplicate files

I'm embargoing this question - just kidding!

These are different file names and AFAIK (someone will correct me) autosave adds suffix only so I don't think these are auto save files, but if these are temporary files for auto backup and/or auto save you probably can't delete them if Illy is running.

Try turning off auto save and auto back up and see what happens. Quit Illy, see what happens.

How are the numbers being added to font of 2 filename at top? Are you typing that, or is it being added without you doing that? What OS version and language? How are the dates on the files, are the 2 at the top the newset and result of auto save. In the prefs for "File Saving" you can turn  off auto save, it is the 1st & 4th settings.

Please tell us the exact steps of what is happening.

Also: which version and system is it?