I suspect you are relying on unreliable people.The internet has a vast amount of wrong information and you need to be very choosy about who you listen to.I can point you to many "sources" that link my family to the Atwoods, which is a complete fabrication.Both of these families are very well documented in both Bertha Clark's and George Randall's books and I would suggest you use those first.
We do not have an exact birth date for Margaret, but it was about 1678.Anybody who says different is lying.
We know she died in Swansea about 1757 when her will was recorded.Philip was dead about 6 years at that time so there is some possibility they moved.It was common for elderly people to end up living with children so perhaps that is where Margret ended up.On the other hand, people in those times often stayed close and sometimes lived their whole life within sight of their birth location.
Dan Taber has made a study of residences and has mapped out locations of who lived where in old Dartmouth.He is a better source than I on locations, but you might have something about a minister moving around.
I know this is not as exact an answer as you would like, but it is all that is known for sure.Many people report speculations as facts and you have to be suspicious about much that is on the internet.
Let me know if you find any facts on the answers you seek.