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On Action -> Pages, if you click on a page to view the evolution, by default appears a graph of Pageviews in the last 30 days. If you change period, for example to 90 days, the new graph displays Unique Pageviews instead of Pageviews and when you click on "Unique Pageviews", it displays Pageviews data.
On the attached image you can see the tooltip with "Unique Pageviews" instead of the selected metric "Pageviews".
Attachment: Screenshot showing the bug
Thanks for the report
In d6f8554: Fixes #3755, fixed bug in limit selector that resulted in wrong order of graph serieses (due to wrong order of metrics) when used in row evolution popup.