That they had to guess about sources of dividends suggests to me that perhaps you did not submit the business tax return to the FA office?
They’ll probably want that.
I believe when businesses are involved it’s best to have the parent involved in this discussion (and in filling out the NPC). Even the brightest kids often don’t understand how business income and taxes fit into the big picture.
I’d just try to lay out the full picture to the FA office and go from there. I don’t think status of lease is really an issue until it becomes ripe and you can have another discussion at that point.