(Not in any order) 1) Notice how, in Volume 17, when Renge tries to eliminate Kurei, she holds out her left hand to release her flame. Yet immediately after that, when Neon saves Kurei, there's a picture of Renge in the background, and she's holding out her RIGHT hand. Although she does appear to ambidextrous later on, using both hands alternatively to create her flames.
2) Despite the fact that all the members of Team Hokage bleed so much during fights, they NEVER die from excessive blood loss or infected wounds. (Okay, so maybe they "wash" their wounds by licking them, but stil...)
3) Recca gets punched around so much by Kuukai, and yet he doesn't get any broken bones or a crushed skull, despite the fact that he gets smashed into the ground so hard that he leaves cracks on the floor.
4) Even though Kagerou is a good fighter, as is seen in the first few episodes, she doesn't help Team Hokage to fight. Why? Isn't it an added bonus that she is "The Woman Without Death"? That way, she'll never lose a fight.
5) Hisui, from Volume 18, had permanant scars on her face, probably because she was injured while fighting earlier on. Yet, Team Hokage have no scars whatsoever. (Recca's scar is not counted, since that wasn't received in combat)
6) In the earlier episodes of the anime, where Tokiya battles Kaoru, notice that Kaoru manages to cut Tokiya's cheek. Yet, later on, the cut has completely closed up and Tokiya seems to be completely healed.
7)In manga 16, when the stadium is breaking apart, Gashakura uses his Foul Spider to break some rocks threatening to crush him and some other people. But wait... wasn't his Foul Spider damaged in the fight with Fuuko? Here it seems to be perfectly all right. or maybe it's just my eyes... ^_^