The only answer I can give about this, is that in Chinese medicine (at least how my doctor explained it to me), what they refer to as organs may sometimes be
systems or complementary groups of organs.
For instance, when I had a liver problem, they addressed not only my liver per se, but a whole system that performs with and helps out the liver.
I have witnessed TCM to work where others have failed, but I don't think it is easy to understand. I much prefer ayurveda, which is (I think) explained more simply. It may be the language barrier...
All I can say is that, acupuncture under a good and knowledgeable doctor, is generally really effective (in my and others' experience). As I mentioned, I used the treatment when I was experiencing hardcore liver effects from drugs. 2 people I know are doing it now, one for breast cancer (remission already) and one for hepatitis. One person I know went from being ultra-obese (think Fantasia) to slightly overweight shortly after treatment.
Acupuncture for me is not something that is wishy-washy. I could actually feel twitches in some parts of my body, and quite remote areas reacting to certain points (which I later found to be part of the same "system"). In my case, it actually hurt sometimes, not because of the needle, but I could feel like some things inside me were sort of being electrocuted. Haha. After every treatment I felt wonderful-- like really "wow" wonderful.
After 15 or so (?) treatments (along with some herbs) I was infinitely better. The hospital I went to had one Western and one Chinese doctor work on your case, and honestly the Western one was really nice but shitty. The Chinese one needed a translator every time and would always say hilarious Engrish things to me.
The girl I mentioned who is doing it for breast cancer now also has the same system-- her Western and Chinese doctor are working together and review her progress together.