I don't recall seeing any Moore tombstones in the Callahan Cemetery. Like I said there are only a few stones and to the best of memory I only recall seeing the name Callahan on them. I am a 8th generation direct descendant of the English brothers who came and settled the Little Pine Creek Valley. My family history is spread out throughout the whole valley and just about everyone buried in those old cemeteries scattered throughout the valley are my ancestors.
I have info on a Isaac Moore and I don't seem to think he is your ancestor. According to the info I have, he had the following children: Nelson, Dennis, John, Mary, Deborah, and Sarah.
There is another cemetery called the Callahan Cemetery its located between Waterville and English Center. This road is the same road that Little Pine StatePark is located on. From Waterville, you will pass the state park. Along the way is a sharp curve which takes you across an iron bridge. About a mile or less before the bridge, on the left-side of the road is the Callahan Cemetery. It sits back from the road and there is a house closeby. In this cemetery are Callahan and Cole family members. I don't recall any Moores.