D2C Negotiation and Streamed Quotes are not always consistent
In many cases, electronic trading systems deliver components for streamed quote contributions separately from components for negotiation rules. But the two are logically connected e.g. Firm quotes on Bloomberg need to be backed-up by auto-acceptance rules for Price Orders up to the published quantity, and price adjustments in response to customer RFQs need to be consistent with, or expressed relative to, the bid/offer spread that was already visible to that customer via their authorised pricing level on those market screens.

On the latter subject, there can also be inconsistencies between the pricing level a given customer is set up with on the market, and that same customer's categorisation in the banks internal negotiation system.