1911 census says that Joseph, 10, was b March 1901. The year may be wrong on census but usually the month is right. None of the children listed were born 1899 or September of any year.
This family is on 1901 UK census in Poplar Surrey. James, 28 Jane, 25 Marie, 9 Annie, Joseph S, 4 mths
A Joseph S Chandler,29, and Wm Jos Chandler, aged 9mths crossed Canada-US border at Niagara Falls August 1929. Joseph S Chandler, b London England from Arizona, in Canada from 1906-1918, at Brantford Ont. He is a surveyor, Parents: Mrs and Mrs Chandler, 59 Grand River Ave Brantford. Wm Jos was born Douglas Ariz.
Border Crossing Eastport Idaho 28 July 1930. Joseph Samuel Chandler, surveyor, 29, b London England, previously in US 1925-1926 in Arizona. Wife: Lois Chandler of Cranbrook British Columbia.
Joseph Samuel, s/o Joseph and Jane Alice Chandler, baptised 16 June 1901, born 1 March 1901.
Doesn't look like this Joseph is yours.
Are there 2 Joseph Chandlers? The WW1 enlistment give 9/9/1899 as birth date with father in Brantford.
Re Albert Chandler, 1911 census Born 23 Feb 1910 Brantford Parents; Joseph Chandler & Jennie Parents married 29 Sept 1895 London England.
Madeline Grace Chandler b June 1908 at Prescott Ont, Grenville County. Parents: Joseph Chandler and Jennie Griggs
1921 census Brantford CHANDLER Joseph, 48, boiler maker, b England, immigrated 1907 Jenny, 46 Emily, 18 James, 16 Edward, 14 Madeline, 12 Albert, 10 Grace, 9 Leonard, 8 Patricia, 8 Lloyd, 5 Gladys, 2 Joseph Jr, 20, knitter [same as on WW1 attestation].
There is no Joseph Chandler on 1930 or 1940census that fits your fellow.