I have noticed my backup files do not generate all the time.

Just today I realized why.

If I edit a model (without saving) and then save the drawing(Ctrl+S) SW will prompt me to Save All the files in the Save Modified Documents window.

If I click "Save All" SW doesn't make any backup files!

If I then Ctrl+S the files individually, SW will generate the backup files... but not when it prompts me to save?

Has anyone noticed and could someone try this?

Am I doing something wrong or is this a terrible glitch?