Lois,
You've discovered the problem I've been pondering as well the last couple of days. The scenario doesn't make much sense unless Hugh and Eleanor left her behind on the island at age 3. She doesn't show up in any census records in Ohio, so here's what my guess is. The Catherine in the IGI probably died prior to Ann's birth. The Catherine in the will is probably actually the daughter of one of Hugh's brothers. His brother John married Jane Shimmin and did not have a daughter named Catherine. So that leaves the other two brothers Thomas and James as candidates. I don't know if either had children, so for now this is going to have to remain a mystery.
Greg