This guy above is stating that the T.O.S. from F2 is the one on F3, there is just kno way, seeing as it was on it own mountain type thing, and in the oceanWell, if we are to attempt to scry some measure of truth from the maps all-together - that place in Mourningwood is most certainly not the Chapel of Skorm. It simply cannot be. Skorm was located far South and East from Bowerstone in the middle of Darkwood (Wraithmarsh).
This place you are speaking of is to the East and slightly North of Bowerstone. Which, perhaps, could be near the Temple of Shadows...but that is quite a stretch. Rookridge doesn't appear to even exist on this new map.