Hello,
What team were you placed on?
Thornwatch
What team did you expect to be placed on?
Reaper's Corridor
Did you change/toggle your selected WvW guild after Thursday night, even briefly?
Yup, pretty sure I did briefly to confirm it was still changeable at around 6PM EST
Have you shard/world transferred recently?
Nope
What is your default world when World Restructuring is disabled?
Jade Quarry
Best of luck with finding the root cause!