Wul- you'll need to remove the screen-shot and replace it with the link to the correct census page.
There's no way to tell if that is the correct family- Robert's birth certificate would confirm names of both parents but I'd be inclined to think kingskerswell's Arthur George Malcolm is more likely.
That Arthur Malcolm is buried Dundonald Cemetery (D1 543)-
Dorothy Malcolm, age 21, Shelter Beersbridge Road (394 Beersbridge Road), died 5 May 1941
Florence Lily Malcolm, age 61, 394 Beersbridge Rd, died City Hospital 9 Sept.1949
William Malcolm, age 29, 394 Beersbridge Road, died The Royal Infirmary Hull Yorks 7 Mar.1954
Arthur Malcolm, age 83, 394 Beersbridge Rd., died 18 Nov.1965
https://ssl.belfastcity.gov.uk/burialsearch/So, it this is the correct family they lost two children in WWII-
http://www.cwgc.org/find-war-dead/casualty/3163202/MALCOLM,%20DOROTHY