@loopylou You may be confusing schedule numbers with door numbers. There are very few door numbers in the census records before 1911 but there are always schedule numbers in the far left-hand column of the census returns. These numbers can and do change as they don’t refer to any building, only to the households within them.
The 1911 census was a bit different. You will find the schedule number in the top right hand corner of page 2 for each household - the part filled in by the householder. The correct address and house number (if there is one) you will find on page 1, filled in by the enumerator before he delivered the forms to the household. The address given by the householder on page 2 doesn't always agree with the address given by the enumerator. Everybody in the same street could call it by a different name.
AS for 3 Craggs Buildings at the Bank Top. From your fragment of paper it does look like John's wife was living there pre-WW1 but by 1921 it was her daughter Ellen who occupied that house together with her husband James Thompson and they were still there in 1939. You need to go a bit further along the road in 1921 to find John's wife Ellen at number 8 Craggs Buildings. She is then widowed and head of the household. Living in are son Bernard and his wife Rachel together with their 5 children. Still at home are sons Joseph C and John Edward.