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Here is a good overview of B6 metabolism:
Vitamin B6, The Under-Appreciated Vitamin - Weston A Price

The gist of your post suggests to me that it is possible your blood was mishandled and therefore resulted in lysed cells (burst). B6 is in red blood cells and when they burst they release B6 into the serum causing a false high reading. This also happens with potassium testing. These artificial readings are called factitious.

Either that or the lab you are using is not calibrating its B6 samples properly so the whole test may be "off".

You do need to take B12 properly to have it be absorbed.
That means on an empty stomach once a day.

I think you should get a zinc test (and also a zinc/copper ratio).
There are posters here who tested very low in copper. Low copper is also found in MS patients, for some reason, and they get copper testing by their MS doctors, for this reason. High serum zinc can cause PN symptoms, and this was discovered by evaluating people who were "eating" their false teeth adhesives (or using too much) Today in US zinc is no longer in those products for this reason.

People who are anxious types breathe differently than others and this leads to minor increases in acid in the blood. Learning to breathe more normally can help this and reduce tingling feelings in those patients. There are many meditation sites on the net that teach calming breathing, and they can be very helpful for overly anxious patients. Some doctors use low dose tryptophan for their patients coming off SSRI's. Discuss this with your doctor. You can search this topic also on Google.