It is important to use GOOD charts and to have proper instructions when localizing acupuncture points.
WAA have seen many examples of bad charts and even worce instructions. And YES Oriental charts suffers the same faith. Often they distracts more than they help.
In the end you are left with the level of knowledge your instructor have. We recomend you to find an instructor that have minimum 3. dan. We also recomend you to use several sourses when you are learning the points.