Keeping stacks closed *automatically*

Question

I'm not new to Aperture. In the past, after editing an image and returning to the browser, only one version of that image was visible -- the edited version. I liked that behavior.
But now, after editing, I see multiple (usually two) versions of each photo I've edited. Apparently, stacks are now the default "feature." But I don't want to have to select the images -- every, single time I edit one -- and tell Aperture (a) This is a stack, and (b) Close that stack. I simply want the previous behavior in which only the latest version of the image was displayed!
How do I restore that behavior??

Answer 1

Thanks for the suggestion. Having seen that option, previously, I'd enabled it, thinking "automatically stack" would "automatically stack and layer" the images, so I'd see only the newest one after editing. But that's not how that option words.
Just now, I unchecked it again, to see if it would make a difference, but it did not.
Unfortunately the behavior I want to eliminate persists, regardless of the status of that preference. It seems "stacks," by default have something to do with images' time-proximity or something ike that.
As I mentioned before, the previous behavior -- with older versions of an image hidden -- sort of "behaved" like what is now called stacks. But the criteria were different.
I'm all for new features (e.g., stacks), but not when they break other features to which we've already become accustomed.