That's not putting them up at the very top and certainly isn't adding useless "Exact source is not displayed in this view" text.
Right now, I'm looking at a range change by change, left some comments on an earlier change, and see a bunch of NOT PLACED comments at the top of a later change. Specifically when viewing a range change by change, we don't need to show comments from earlier changes when viewing later changes.
I'm not sure how this would apply to rounds yet; we don't have controls for them and I haven't noticed whether I've reviewed a second round yet and seen this behaviour then. Let's hold off on doing anything there for now.