You are correct that you would add 2 + 1 +8 = 11 = 2 to get your Key. You would then add that to the present year to arrive at your Personal Year - 2 + 2 + 0 +1 + 7 = 12 = 3. So 2017 is your Personal Year 3.
I don't understand what you are asking in the second part of your posting. Can you express it in another way? If not, why don't you email email@example.com and provide your phone number so we can connect real time and sort out what you are questioning.
All the best!