If you sign a cda with a company who has multipy locations, will the terms of the CDA travel, or must they include "...and affiliates"

The number of locations is irrelevant if it is one legal entity.  The question is whether all the locations are owned/operated by the same legal entity, e.g. xyz corp., or whether each location is owned/operated by a different legal entity and, if so, whether eacfh legal entity is party to the contract.