Active runway is based off wind directions, not a normally used runway. If FSX weather sets wind at a heading of 360, then you'll be using runway 180. See, wind conditions at LAX are usually in favor of runways 25 or 24, although they're in the wrong direction for many things, except Asia and hawaii. However, if you set FSX weather to 250 degrees, it'll put you on runway 7 or 6 because thats favorable to the conditions, although its not what's commonly used. another company makes they're stuff right, so trust them.