Diagnosed with autoimmune pernicious anemia 5 years ago. levels still low or at times borderline despite monthly injections of cyanocobalamin.

What's wrong?: If the level of B12 is not enough you may need a larger dose. If you mean you still have a mild or borderline anemia that can be OK. There is no reason to make you better than normal ( borderline is still normal ). I see you have a low ferritin and a high iron saturation. Talk with your doc about why those numbers are what they are. You may have another source of anemia.