I don't believe it is working as intended.
I put the same player's stats as all 10 positions, PG1-C2. All 10 display correctly. His 2-3 defensive values from Column BR in order of position are 84,84,71,71,58. However, the D value in column AE when I set H7 to Zone shows the defense of all 10 players as 82. That is obviously not correct IMO.