I was actually working on a post that described the very movie! (I think.)
Isn't there a novel version of this story that reads with the true order of events?
I remember a movie that basically plays all the events in reverse, storytelling. It probably is Memento. The novel of that same movie goes in straight order. The argument is the same in both. It's more powerful in the first because the storytelling supported the argument in a metalogical sense. I haven't fully examined the movie, but from other things, and my understanding of Dramatica, it more than likely follows the PSR using the true order of events.
The PSR is trickier, though, structurally, because it's a more internal view of the story. However, it still considers the events in the actual order that they happen within the chronology of the story.
The structure should be seen as the logical progression of the argument, while the storytelling should be viewed as the way you wish to present said argument.
This example kind of makes that point for me, at least in the way that it is described here. The reveal makes clear what happened, and why things happened the way they did. That is, it explains a portion of the argument of which we were unaware. But, it didn't really change what was being said; it only clarified things.
All this being said, there are stories where the flashbacks and reveals are part of the structure. Memento, if memory serves on which movie this is, would be an example of a story where they are not. I cannot currently think of an example of where they are, although thinking on it, I suspect the novel Where the Red Fern Grows probably has structural flashbacks.
I would recommend using the search feature of the forums, as I remember reading similar questions, and many of them had answers better than I might provide. I think one even had an answer from Chris.