https://imgur.com/dnVvtjE I have definitely viewed these games in the last month

Currently, those things only updates sporadically, so it probably still didn't update since the last day of October so that's probably why it says last month.

@dha No, all the updated statistics clearly use a different system—anything happening in October gets listed as last month, up to October 31st. This also applies to the "recent runs" section of the leaderboards, see this example.