Never really paid too much attention to it. I only used it for filtering updated games and selecting a particular game to download, so I have no idea if it's been an ongoing issue or not.

When I open my library, sorted by purchase date, I see the first game and know it's not the last one I purchsed. So I refresh. Now there's a different set of games on the shelf, but still not the last ones I bought. I repeated this another half-dozen times, getting different lists every time.Eventually, my last purchase will show up, but invariably there's at least one on the first page I bought well over a year ago.

OK, try sort by name. Same thing. 1nsane is the. first in the list, refresh and now it's AD2044, refresh again and now it's Age of Wonders. And as I read through the first page, they are clearly not in order. There's a bunch of games starting with "A", then a bunch with "B", then a few with "C", then a few with "B", then most of the missing "A", though paging through, I find a few games starting with "A" on page 4 and 5.

Anyone else running into weird things with their shelf?

[EDIT]
Oh, I see I'm not alone. There's a 5-day old thread about musical chairs talking about the same behavior.
[/EDIT]

We have several threads about this. You are not alone. The GOG staff is aware of the problem and is working on it.

https://www.gog.com/forum/general/my_account_seems_to_be_playing_musical_chairs/page1

*edit*: Oh, you edited your thread while i was still typing. :)