However, let's say that we weren't paying attention to what we had our CDI 2 set on, and we left it on say a 320. Let's take a look at what that scenario would look like.
You can see that you would never get a flip on this setup. If you tracked the localizer all the way in, with a 320 set up on #2 CDI, you would have a FROM indication all the way in. Let's say you had #2 set up on a 140, and you happened to drift off course before you hit the FAF. You would actually get a TO/FROM flip way before you crossed the VOR.