That's what it looked like to me. I assumed hamstr builds the event with the pubkey of account A, account B signs it and then the validation on the relay(?) rejects this. But I don't know the details.
Discussion
I could not post this from a different account
Cool! Thanks for testing this. I was going to say, "I'll know when I mess up sometime!" It would be nice if Alby could somehow be set to know which account was which.
it would be easy for the client to check this before sending the post and give the user the option to switch.
we should ping the hamstr developers for this.