I think what you're saying agrees with what I'm seeing.

An Auction Lot is "owned" by a particular Auction Profile. That profile's email address (and there's only one per profile) is used for email associated with that Auction Lot. Invoices are also "owned" by an Auction Profile, so same behavior there.

Until I'm way busier than I am now, I can work around this by manually moving the queued messages.

Ned