Negative, our mistake. we get aircraft/company data from airliners.net
But who guarantees which is more reliable between GAS/airliners.net? There will always be errors on both sides.
With respect, you are completely missing the point.
It's not about which source is "more reliable" - it's about what information you can reasonably expect to get from each.
You can't look up Mode S codes on Airliners.net - it's not designed to do that. And anyway, once you have looked up GAS, or airframes.org, or any other online sources that you are currently evaluating, you
already know the aircraft type, MSN, etc.
But then you choose to
throw away that aircraft type information and instead fire the registration/serial at Airliners.net and accept the details that
it returns.
However Airliners.net doesn't care if a registration has been re-used on several aircraft, or if the same military serial is currently in use by a dozen different air forces, and if you blindly accept the data and photos that it returns without verifying it against what you already know from the Mode S lookup, then you must expect users to be confused.
So it's not about accuracy or reliability, it's about exercising a bit of common sense.