I am hoping this information will be helpful. I found several marriage records for Amanda Smith to JC Bradford. The most helpful one was dated 5 Nov 1853 in McDowell Co, NC.
I found for the 1850 Census for McDowell Co, NC: William Smith 1797; Cuffie Smith 1790; John Smith 1800; James Smith 1801; various wives + children; Amanda Smith 1830 There are 44 record for Smith in McDowell Co. for 1850.
I found this Amanda in the household of William Long
45 NC; Mary Long 80 NC; Amanda Smith 20 NC
Maybe Amada's mother was a Long or she might be a servant.