Those are just the defaults - I haven't changed those. Here's the testing I've done in Windows:
- Close Sublime with no documents open, open sublime, no new file created.
- Close Sublime with new file open (not saved to disk), open sublime, same new file exists, but no other tabs
- Close Sublime with file open (real file on disk), open sublime, same file opens but no other tabs
- Close Sublime with no documents open, open text file with Sublime using context menu, Sublime opens that file, no other tabs
Basically - no combination of opening and closing files gives me any unwanted tabs.
HOWEVER... there is a default blank slate that Sublime opens with. The text editor is there and available, but no tabs are created. If you start typing, then a tab is created. To me this is awesome. I don't have to specifically create a new file. It's ready for me to type - or not type. If I open a file, there's no New document tab created or anything. Is that what you're seeing?