Aperture creates 2 copies upon editing

[Annngel]

In Aperture 2, after i'm done editing in photoshop as my external editor or use noise ninja, there's be another copy created to see difference. So if i use photoshop and then nose ninja, there'll be 3 copies.

Is there a way to prevent it from doing that?

Yesterday after i'm done in photoshop and save, the thumbnail in aperture automatically updated but i don't know what i did but somehow instead of updating it, it creates a new copy.

 

[pit29]

There's no way to do this... As you may know, adjustments in Aperture itself are not saved as changes to the images, but as information (e.g., contrast +2), and all adjustments you make are re-applied whenever you open an image. Because of this, Aperture is non-destructive, i.e. never alters the original file.
However, if you open that file in an external editor like Photoshop, there's no way for Aperture to know what you have been doing... Therefore it creates a new image from the file that Photoshop passes back on to Aperture when you're done.