For the 1st question...Does he hold a COMM-AMEL? If so then for the add-on he will only have to demonstrate the maneuvers as you listed however if this is an initial Commercial ride then anything on the PTS is fair game.
For the 2nd question...this is from the DPE Handbook Section 15 101.e.2
(2) Determine that the applicant holds at least a commercial pilot certificate or an ATP certificate with an aircraft rating appropriate to the flight instructor rating sought. If the applicant is seeking an airplane flight instructor or an instrument flight instructor rating, verify that the applicant has an instrument rating.
I would assume he has hold the COMM-ASEL before he is eligible to start the checkride for the CFI-ASEL ride. Granted he could probably still do them on the same day but not on the same flight.