On approach to runway 27L at KPHL the NGX's autopilot will not track the center of the localizer, it's tracking inbetween the middle and one circle over to the right. The winds are calm and there shouldn't be anything else causing this. On the pedestal I have 109.30 tuned into both nav radios and the course selectors are both on 265. I checked if the course and frequency given from the FMC was accurate with FSX from the Map and it's exact. I tested it in a Fail operational aircraft to see how the aircraft behaves with a full autoland and rollout and the aircraft never moves to the center of the localizer. The runways also do not line up on the ND to where they are in the sim. I updated my Magnetic variation to the 2010 version but nothing has changed. Does anyone have any ideas?

I have the same Localizer deviation on the ILS 27L. About one half dot like you stated. On the approach chart it does indicate that from .6nm to the threshold the LOC is unusable so there's a real loc deviation in RW. No autolands on that one. 09R is the CATII/III runway at PHL. Shouldn't have any problems there.