The D7000 has two similar-sounding but distinct controls for the number of focus points to use.
Custom setting a6 allows you to choose between having all 39 points available or a reduced number if 11. Using 11 makes it faster to select one AF point manually.
Dynamic-area AF Mode (as in the spreadsheet) allows you to choose whether the camera uses data from 9, 21 or all 39 AF points to determine what to focus on. This is explained on pages 94-95 in the camera manual.