Thought Bloomy's solitaire completion time was weird until I saw my Mahjong time. I think it was a weird DLC thing of like 2 achievements that showed up as a second game for some reason.
I thought it was weird, too, but the tracking must be just for the base game. Both had 3 achievements for 40 points. At the time I completed it, that was it, and a later title update added more. My first 2 achievements in the Win 8 Mahjong have the same timestamp, with the third nearly 3 years later. If you started the game with a hard puzzle, you could potentially have a 1 minute completion.
And by checking on that, I see I have 27/30 in the Win 10 Mahjong, just needing the 3 medal challenge ones. Last pop was June 2018, which may have been when work blocked XBL connectivity. Should download that on my personal laptop and work toward finishing that up this year.
It looks like only 1 person completed the decade with a daily achievement streak intact. Unfortunately, his decade stat image doesn't appear to load.
Also, for those having trouble posting YouTube videos (and maybe Tweets) as embeds, in the formatting buttons for posts, click the gear button in the editor. Should pop up an option to post as plain text by default. When you paste URLs, they won't appear as clickable links, but when you preview / post, YouTube links should embed while other URLs become clickable.