Thanks for checking with Jeppesen!
I uninstalled Navigraph, and refreshed the scenery library in LNM based only on default data, and the ILS 06 localizer originates from the proper location. Reloaded navigraph, refreshed the LNM scenery library again, and it shows the ILS originating on the left side of the runway as in the above screenshot.
I looked at the 0x0013 record for this ILS in the default NAX file in /fs-base-nav/0302/27170.bgl, and compared the DWORD values for the localizer Longitude and Latitude to the Navigraph version of this same file, and they are exactly the same The only difference I see is that the default NAX file has the localizer variation set to the 2020 value of 11.5 W, while the Navigraph file has the FAA published variation of 12.0 W, but I wouldn’t think that would produce a position shift of the localizer origination point in the scenery.
Of course, as we know, when the default nav data is the only source, and when flying a default aircraft in the sim, something in the APX file forces the localizer to the runway heading no matter what the NAV file contains, so perhaps LNM is being affected the same way?
According to the FAA 5010 document for KELM, the ILS 6 localizer antenna is at N42 10 6.283 and
W076 52 45.51
I don’t know how to convert the DWORD values in the BGL back into the corresponding decimal lat/lon, but looking at the Navigraph data for another add-on that has the localizer data in standard text format, I see that the IUEK latitude is the same as the FAA value, but the Jeppesen longitude is slightly different than the FAA’s.