There is definitely a lot going on among the Cunningham families in that area, and of that era. Those without patience are never going to figure this one out. :)
I am descended from Samuel's son, George. She was married to a Catherine. Nope, certainly not the same Catherine the plot next to Samuel at Comery Cemetery. Which brings us to Eunice. Is she Catharine/Catherine? Building on that idea, the only thing I got out of that was there being a Catherine Cunningham (age 91 in 1860 census) in Waldoboro living with another family, Christopher Newbirt as head-of-household. His wife was Jane, formerly Jane Cunningham. I have no idea who she is, so I just have a bookmark of speculation around this. It could be nothing, but not to be ignored.
All that being said, glad to connect! We'll get to the bottom of this. We must!