Initial CFI notes

I've been doing a bunch of initial CFI check rides lately.  While most are doing well I have had a few problem areas.  

1.  Area of Operations (AOO) III, Task C: Operation of Systems.  The Object is to determine the applicant exhibits instructional knowledge of the elements related to the operation of systems, as applicable to the airplane used for the practical test, by describing the following systems:.....  (I won't list them here.)  The problem has been describing the systems as it relates to the airplane being used.  Some applicants have not been describing the system on their airplane but of another.  Other applicants have done a rather poor job of actually describing the system in general.    I like to combine this task with AOO XIII, Task Systems and equipment Malfunctions.  This is a required Task and the PTS requires the applicant to exhibit instructional knowledge of at least five of the equipment malfunctions appropriate to the airplane used for the test.  A typical question to cover both Task might be:  "Explain the electrical to a student pilot.  Explain the indications of an alternator failure and the procedure to follow."

2.  AOO XI, Task G Spins.  The FAA allows a DPE to accept a log book endorsement attesting the applicants instructional competency in spin entries, spins, and spin recovery.  This doesn't prohibits use from asking a few questions about the subject.  I usually ask about a situation that could lead to a spin and then ask about the spin recovery procedure.  Most CFI applicants and spit out the PARE procedure but several have difficulty discussing the "why" behind each item.  For example.  Why do we have to bring the power to idea?  Why must the ailerons be neutral?  My question is, If we can't explain the reasons why we do these things, are we demonstrating instructional competency?

3.  AOO XII Basic Instrument Maneuvers.  No big issues here except that this AOO is with the applicant flying under the hood or Foggles.  Note item number 3 in each Task requires the applicant to demonstrate and simultaneously explain the maneuver solely by reference to instruments from an instructional standpoint.