I looked at the files you questioned above. The first file should be Mathis-23, but I think you just made a typo on that one. When I researched that file, I found a Massachusetts marriage license for her and Jabez Snow. On that record her name is listed as Mathis. But the rest of the records I could find, I see her name spelled as Matthews (with 2 tt's).
I would propose a merge of the two profiles, and I would spell the last name Matthews. My reason for this is the spelling of her brother Joel's name in the Book, "The History of Woodstock, Vermont", 1761-1886, pgs. 72-73, by Henry Swan Dana.