I would not be too worried about your situation, I think its normal not to see real improvement until you address several different areas, then all of a sudden - noticeable improvement!
If you have 4 flat tires on your car, and replace 3, you don't see much real improvement, then replace that 4th tire, and bingo! :smile:
I love that analogy. I've always thought that playing pool with a stroke flaw was like driving with a flat tire... you can't really drive (or play) the way you are meant to until the problem is fixed.