The exact same problem occurs with "ring".  Are the even integers a ring or not?  But mathematicians all understand the ambiguity and have no choice but to live with it.  The lay reader needs to be told that "range" has two meanings, or else the lede should not use the word at all.  But many people, not mathematicians, remember the word "range".  They have a right to be told what it used to mean, and what it means today.