I get transgression notices when I return to negotiate with the same faction twice in the same turn. For example, I offer an alliance and trade rights for x dinar and either get my price (should have gone higher!) or haggle until the agreement is reached. But if I close the scroll and then reopen it to sell map info I usually get a bad boy notice even if I took their first offer.

I don't get any if I do all my business in one roll of the scroll, regardless of the amount of back and forth it took to reach a bargain.