PRP can have a red tinge to it and still be effective. It depends on the process/centrifuge/company. The key is to get the concentration of platelets to 6x the concentration in regular blood which is 1.5million per ml. I like using the Magellan Tru PRP system because it can predictably get this....
This is not possible. Your own blood was used. The reaction is either related to products placed during/after the PRP or poor sterile technique. The picture is hard to discern exactly what is going on.
I have never heard of this happening. I can understand that there might be some pigmentation from the old bruise which is hemosiderin. This might respond to laser. I can't give you further advice without pictures. I would say that this all should get better with time however. The Facelift...