My vitamin b12 Level is too high

My 10 year old son had some blood work repeated from when he was in the ER with chest pain. The second set was done 9 months later when he was completely healthy. Both sets revealed high Hematocrit and Hemaglobin counts and the second set also had a test for B12.

His B12 was high. He does not take vitamins. I have read a lot about Hematocrit and Hemoglobin and find references to B12. I also saw an article about high B12 showing some symptoms which my son displays such as chest pain, insomnia, frequent urination, anxiety, skin conditions such as early acne. I also found articles that said there is no such thing as too high B12 because it is water soluble and excreted in the urine. I was wondering if you had any information on why his B12 might be high when he doesn't take vitamins (he is always well hydrated as well) and also if you know of any links between Hematocrit, hemoglobin and B12.
Thank you.