Ehy, I noticed that, too. I just wrote it off as "Rags Morales, you fucked up! Odd nobody caught that..."
My problem with this issue is Flash being stabbed, yet seeming perfectly fine after the battle. The hell? I assume there's something about Deathstroke's sword I don't know?
I guess Atom's crossbow did her no good... I can't say I have the same sympathy as I did for Sue Dibny (I got to know Sue a lot better), but I can't wait to see Atom's reaction.