Hello Mickey Goldmill, your concerns are not uncommon and you are right to question what is and is not being done. It is often difficult for electricians to speak in lay terms to clients so that they understand what is being done.
I spend as much time that is required with my clients to reassure them that they are in safe hands, I give them my mobile number and allow them to cal me at any time, in fact today I had a call from a client who's install was carried out last year, she had a concern that I was able to sort over the phone.
If you are having doubts or concerns you must raise them with the electrician, his answers should ease your mind, if however you are still not sure this forum could help you ask the right questions, and give you a general opinion based on your posts.
One thing I would say is you are the owner responsible for your installation, so ask as many questions you need to ask to satisfy yourself its being done right.