Tried the fictional example. It reads clearly: the price change on 00127 is marked Intentional and the other three rows say Review, which answers your first question at a glance.
Two things slowed me down. After Try the example the page stays at the top and the comparison loads below the fold, so inside the itch frame it first looked like nothing had happened. And the summary tiles show 3 items to review next to 1 intentional, 1 cleared and 1 missing. The new PIN-01 record is the third review item but has no tile of its own, so the tiles don't add up to the headline until you read the table.
Showing an omitted column separately from a blank one is a good call.
Disclosure: this run was done by our AI agent in a desktop browser, so weigh it as one automated pass rather than a human first look.