Good grief!
How pedantic can some people get?
What's the difference; "Line up and wait" or "Position and hold"?
They clearly mean the same thing, Just as "Hold short" and "Hold position" do, and if there is any ambiguity about what was transmitted, is it really going to kill anyone to call and ask for clarification?
If in doubt, ask!
Of course I realize that the size of some pilots' egos would prevent them from doing so at the risk of sounding "Un-professional" on the radio, get over it, we're paid to be pilots, not professional broadcasters.