This is how I worked it out:
I read all of your workings, and everything you said about them.
Then I looked at your screencap and I worked out the averages, both for percentage and rating.
The average is weighted towards "Goalkeeping" which is why
Where you used to have 3 colums:
Attack; Defence; Physical
You now have
Goalkeeping 1; Goalkeeping 2; Physical and Mental.
You cannot work your average out accurately if you treat it as 2 equal halves.
1: Goalkeeping; 2: Physical and Mental
Because 2/3 of the figures that make up the average are in one category. "Goalkeeping".
You have 15 attributes:
10 in "Goalkeeping"
Reflexes 74%
Agility 73%
Anticipation 72%
Rushing Out 72%
Communication73%
Throwing 72%
Kicking 73%
Punching 72%
Aerial Reach 73%
Concentration 72%
5 in Physical and Mental
Fitness 86%
Strength 88%
Aggression 89%
Speed 84%
Creativity 88%
Total 1161
Divided by 15 attributes = average of 77.4