The IAF/IF has been incorrectly labeled only IF for a long time. Finally, some sharp Boston Center controller brought it to Aero Nav:
FDC 5/0975 - IAP GREENVILLE MUNI, GREENVILLE, ME.
RNAV (GPS) RWY 14, ORIG...
CHANGE TERMINAL ROUTE WELUG (IF) TO WELUG (IF/IAF).
THIS IS RNAV (GPS) RWY 14...