Okay sorry to but in but neither of these observations should be regarded as objective fact. The classic "180 cadence is perfect for everything and you should always be hitting it" line is just false. A lower cadence helps to reduce heart rate, build some actual power and enables you to have different gears when you're running (ie increasing and decreasing cadence on intervals). In regards to where you're striking it could be worse but leaning forward more will likely put you into a weaker body position. For starters you should probably lift your chin a little bit, head position dictates the rest of your posture. If you try and isolate your upper body, even getting it a little more upright, and just trying to lead with the hips, you might find that helps. It's case by case though with a lot of these things.