If you have a significantly offset ILS, it's likely that another source is overwriting our custom navdata. This happens with addons such as Navigraph. To ensure that this doesn't happen, NZAA must have higher priority than other addons that provide Navdata. To check this, find your content.xml file, found in the root MSFS installation folder > LocalCache folder. NZAA must be one of the last entry positions. The line for NZAA looks like this: The lower the entry, the higher the priority. If you just installed NZAA, it should already be the last entry which is correct.