You say you don't mention a number, but saying "I'm in the 90's" is basically the equivalent of saying "I make $90,000" as far as the negotiation is concerned.
Was thinking exactly the same thing, because this is exactly what I think when candidates say "I'm in the X's but looking to improve that". Well, yeah, of course you're looking to improve X. You still set the floor, saving me the trouble of guessing it too high.