Looks like the family moved, as I found the following in Hastings district:
September qtr 1889
Hastings Vol 2b, page 34
ISTED, James
June 1893
Battle (inclides Ashburnham) Vol 2b Page 51
ISTED, Fred
Hastings Vol 2b, page 46
ISTED, Frederick John
March 1896
Hastings Vol 2b page 39
ISTED, Kate
December 1900
Battle Vol 2b page 46
ISTED, Alfred Thomas
The 1901 census (Ref RG13/875/92/2) shows Charles, Mary and eldest son Charles as being born in Ashburnham. The rest of the children are born in Hastings.
Their address at the time is Avery's Cottage, Felsham Bridge, Hollington St John, Battle.