yin yag flow for tai chi

Hello,
In the tai chi online instruction that I an doing with bruce I believe that it is lesson 12 or 13 bruce goes over the flow of chi in the body with respect to application of tai chi. I believe Mr. Frantzis stated that to have the energy flow downwards the outside of the arms and upwards on the inside of the arms for chi flow. My concern with this is that from a energy medicine practitioner and acupuncture stand point of view. For instance the yang meridians of the arms (outside) primarily run up the arms. Li-1 (Large intestine) starts at index finger and runs up to Li-20 by side of your nose. Si-1 (small intestine) starts at pinky finger and runs up to Si-19 by your ear, Th-1 (Triple warmer/heater) starts at ring finger and runs up to Th-23 by your corner of eye/ temple area.
The yin (inside) run down the arm for example the Ht-1 (heart) starts out close to your arm pit and runs down to Ht-9 at the pinky finger. Lu-1 (lung) starts out by upper out chest and ends on Lu-11 at the thumb. The HC/Pc-1 (pericardium/sex/circulation) starts out at by nipple and runs to Hc/Pc-9 of your middle finger.
In general the only time I would have a client’s meridian flow run back wards if their was a specific blockage that needed to be back flushed, kind of like using a plunger to unclog a toilet, you reverse the flow temporarily. But NOT long term that would continue to weaken the meridian and the organ(s) associated with it This would make them homo-lateral. (energy running backwards/scrambled.
So why did you instruct us to push the energy out/ down the yang (outside) of our arms and up the yin (inside) of our arms when that is the opposite directions that the meridians flow? All of my medical experience dictates otherwise. Please Mr. Fratzis I know that you are an expert in your field(s). Help me to understand, was this just a mix up reversal when you were describing it during filming or am I missing something.
Thank you for taking the time to read this and answer.
warm regards,
clay