Your doctor is wrong. The positive on the test means you will ovulate 24-36 hours later. You want to have the sperm waiting for the egg, so you have intercourse or an IUI. I conceived both kids with an IUI--got a positive in the afternoon and then went in the next morning for the insemination.
And yes, you're correct about the temp. Once your temp jumps, that means ovulation has already occurred. I'm guessing your doctor was tired and confusing the 2.