Agree, and I misread what you wrote. Indeed, both statements cannot both be true, as you stated, as one excludes the other.It's possible that he only meant to avoid overstating an outlier, but even your explanation concedes that he instead mistated a fact.
Either 11 inches is as far from the wound channel as they found lead, or it is the average of a set of numbers, some of which are higher. It cannot be both.
My initial interpretation was 'these statements cannot be true.' Which of course is not what you wrote. My apologies.