Why would i get a high voltage reading (55mv) for the bias on my fender scxd (superchamp xd)?

I tested It as per the schematic provided by fenders website. I had read that they are normally low like 30's to be on the safe side. So I opened her up to set it to 40 like it's supposed to be and when I test it it shows 55mv at tp22. so I adjust it to as low as the blue pot will go but it only goes to 45 mv. could it actually be lower and my reading be that off? I coudnt use a high quality meter.