Generally blinds are considered differently. The positions usually refer to pre-flop:
UTG
UTG+1
UTG+2
MP
MP+1
MP+2 (or HJ)
CO
BTN
SB
BB

Since SB and BB are last to act pre-flop they're not considered EP. Since they're first to act after the flop they can't be considered LP. I think it's best to think in groups of EP,MP,LP,blinds.