ILS instrument accuracy? Help......

I'm just starting to work on my Instrument Rating and yesterday when doing an
ILS approach I was keeping the localizer centered and my instructor told me to
look up about a mile out. We were maybe 200 yards off the centerline. Next
one we stayed on the centerline (visually) and the needle was 1/2 deflection.

Any thoughts about what to do? It seemed like a practice ILS I did at another
airport didn't do this a couple of weeks ago. Could it be this one facility
(BHM)? Do I need an avionics shop to look at it?

I'm new at this so I'm not really sure what step to take next. Any help will
be appreciated.


Trip