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So, there's something wrong with them. Counts as 0 on my profile, even though I have quite a few. All of them count as Completed Offline and all have 100% unlock rate.
Fixed! The timestamps not showing, however, is normal. We only have access to the same data the Overwatch website shows and Blizzard doesn't show the timestamps on there currently. I updated it to read 'Timestamp data not available for this game' instead.