Ens. Abiah Carpenter - Abiah Carpenter wifes parents?

The notes for Abiah Carpenter says he married sisters Sarah and Mehitable Read. If you look at their linked profile they do not have the same parents. Sarah is the daughter of Thomas Read and Elizabeth Read. Mehitable is the daughter of John "of Rehoboth" Read and Sarah Read. If they are sisters one of their parents is incorrect, if they are not sisters then the note is incorrect.
Something else is a little strange it that Mehitable's brother John "of Rehoboth" Read, Jr. has a daughter by the same name and she was born and died the same years as her, just a little off in the day and month of birth. Are these the same two people and if they are which is the father John JR or SR? If John Sr is the father his wife Sarah would have around 53 when she was born.