I can’t replicate this on my test site. Everything seems to be working as expected.
Steps:
Topic 1 → topic admin wrench → pin topic → global timeframe = forever → pin globally
Topic 2 - repeat
Topic 3 - repeat
Order displayed:
Topic 3
Topic 2
Topic 1
I then unpinned Topic 2, and re-pinned it. As it is now the latest pinned it appears at the top of the list:
Is there something else I could try to replicate what you’re seeing? Does it work in safe-mode? [YourSite]/safe-mode