Thanks for your answer. Now I see the little R3 legend for the first up arrow that is in the R2 row. I'm not sure why it wasn't just placed in the R3 row.
It's still not adding up to me. The text of the arrow set says, "This kit includes sets of five arrow keys (four directions plus an extra up and down arrow)" In this picture I see 6 keys (R2 Up, R3 Up, R3 Down, R3 Left, R3 Right, R4 Up). Also, I was thinking that the R4 would naturally be down, not up.