That is the way it works in my Yahoo league. The defense doesn't get dinged when the offense gives up a touchdown - interception or fumble return.
QB (1) Brees, McNabb
RB (3) Westbrook, T Jones, LenDale White, R Rice, F Jones, Booker
WR (3) Wayne, Housh, S Holmes, Bowe, S Moss
RB and WR - 1 pt per rcpt, 1 pt per 5 rush att, 1 point per 10 yards rush or receiv
1 pt per 10 return yards.
6 pts per TD