The marriage that looks bogus to me is the Laurena Fretts marriage. One child born just 3 years after Townsend's marriage to Lucy. The other two marriages look fine to me - both have marriage records, both have children produced in the right years and Sarah dies in the right year. My bet is that EITHER Lemira's mother is Lucy or the Thomas who was married to Sarah and Lucy is not Lemira's father.
The Hart book doesn't have Sarah's death date, which means he doesn't realize it's chronologically impossible for Lemira, born 1849, to be the daughter of Sarah, who died 1846.
Note: this is all based on the dates involved, it could be very wrong.
https://archive.org/details/historygenealogy00byugood/page/204/mode/2up - Goodhue genealogy
Now my bet is on there being two Thomas Barrets - see your newspaper link here:
Mrs. Goodhue's father, Thomas A. Barrett
Emphasis mine. There is no name starting with an A anywhere in Thomas Townsend's name.