Hi. I looked at 1900 first and the index lists him as Mark and her as Mat. But I looked then at 1910 and I'm sure they are the same people. Anyway the handwriting in 1900 could be interpreted badly.

1910, Georgia, Oglethorpe, 234 Grove Creek

Mart Oglesby,head, 42, B, Marriage 1 or 2(probably 2, look at Martha's age and Lizzie's age), married 14 years

Martha Oglesby,wife, 31, B, Marriage 2, married 14 years, 1 birth, 1 living
Lizzie Oglesby, daughter, B, 21or2
Verie? Oglesby, granddaughter, B, 1 8/12
Jessie Oglesby, granddaughter, B, 4
Jimmie Oglesby, grand son, B, 4 (twin?)

1900, Georgia, Oglethorpe, Grove Creek, ED 95

Mark(but looks like Martin) Oglesby, head, 30, B, married 15 years
Mat Oglesby, wife, 26, B, married 15 years, 2 births, 2 living
Lizzie Oglesby, daughter, B, 14
Earl L Oglesby, daughter B, 9
John Oglesby, son, B, 7
Scott Oglesby, son, B, 5
Albinus Oglesby, son, B, 3

Interesting the number of births to "Mat" and "Martha" as compared to the presence of children in 1900.

There are also more Oglesbys on the same page in both years.