I'm a bit confused now, too.
I have a Mary Jane Ross married to Miles Beach in 1880 (Madison Co., AR). Miles was born to Miles and Aletha Vaughan Beach in 1850 in Madison Co. Mary Jane Ross was born in 1853 in Jasper, Newton Co., AR, to Angus and Catherine Ross. Miles and Mary Jane had five kids: Malissie Pearl Beach (Jul 1881); Miles Cleveland Beach (1880); Lithie Beach (1874); James M Beach (1876) and Miller Robert Beach (24 Aug 1879). I have Malissie marrie dto Wiley Bert Fritts and movingto Texas.
Then I ALSO have a Mary Reeder, born Apr 1855, married to John Benjamin Beach (went by Ben). I have Mary's parents as Thomas and Eliza Jane Fowler Reeder. Mary and Ben had three kids: Letha Elizabeth (24 Aug 1874), Marion P (Jul 1879) and Miles (12 Jan 1883). My husband is a descendant of this Letha.
Therefore, I think that Mary Jane Ross and Mary Jane Reeder were TWO different people. I have some info on the Reeders, if you're interested.