Need Help with Filter

I attached the entire spreadsheet that I use....I highlight rows A3-M13. I click on the data tab on top of the excel menu. I click filter that is right next to the sort button. Tabs will show up on A3, B3, C3, D3, E3, so on and so forth. I click on A3 drop tab "358". I select "sort from smallest to largest". Normally this would sort everything back in sequence from 1-10 for A4-M13 only excluding A3-M3. Now however, even though I highlight A3-M13 and only want that section put in sequence the entire page is put into sequence as if I highlighted the entire page when I have not.

This is the best I know how to explain what is happening. If there is anyone else that can lend a hand please feel free to jump in...