i am not aware of the heart rip situation with logan and sabe. so i cant tell you if it went through the ribcage or not. the more likely plausible reason would be that sabe went through the abdomen and then to the heart avoiding the ada. bones. if not i would place in as bad writing PIS if you will. that would have no place in the forum.
now i am aware of Lt. Warren ripping logans heart in a fight. L.T. went and was shown by artistic depiction of his fist and arm traveling from the abdomen toward an upward angle allowing him to bypass the ribcage. that example is not pis nor does it violate the characters ability in any way.
what blade did, did violate logan's power and character ability in that it penetrated ada. bones at an angle that should not be possible.