In case it wasn't obvious, we were all switched personality. Yes, it was the castle because Glenda left. The house-elves were prevented to tell us. Winky also confirmed that the castle sent back Cho and Teddy. This answers the question of what happens if we leave.
On the other hand, during this experiment, Parvati had a brilliant realization that the house-elves can evade traveling bans, so we have a way to get food. Peter, you don't need to bother with the greenhouses. Lucius will take over for Cassandra.
Lunches are going forward as planned in my room
I'm sorry I wasn't able to greet you properly. I'd like to meet you before lunch if that's okay.
Parvati, Padma, Jamie
We need to speak about your memories.
We can do commerce directly with foreign companies through the house-elves. Make the brooms and food a priority. If you need Savannah for the broom, reach out to her.
I had your memories. Maybe once things calm down, we can talk.