It's actually broken up into two parts. Only one part is shown in the user info when you make posts.
Feedback Score: 10
Positive Feedback: 100%
Members who left positive: 10
Members who left negative: 0
Total positive feedback: 18
colored names is what is shown in your info. That number only counts every member that has ever left a positive comment once
. Like Noely1987 has left you 5 positive comments but it only counts it as a +1 iTrader
when adding up the values.
It just tells members how many people you've done transactions with. If they wanted to see the total feedback, they can just view your iTrader page.