Yes, I see the problem. I have the same problem with my line - Mary Halfhill Thomas. I have never found a death record for her. She was baptised "Maria", but always used "Mary".
I discovered that my copy of Jacob L. Halfhill's will is too streaked and blurry to email, but I will run to the library for another copy. While I am there I will see if I can find any other records where John Wesley's proper name was used.
I know there was some sort of guardianship papers involving Jacob's childen. I believe Mary Ann remarried a Hysell from Meigs County.
I will get back to you soon.