Unusual Entries in 1911 Census

[Elderflower]

I have never come across a census completed in this way before but wondered if anyone else has?

I have attached an extract from it.

Samuel Manley 1911 snippet.jpg

Samuel Manley is shown as having had 7 children born alive up to 1911. I had already found the Birth registrations for all 7. It also shows that 5 were still alive but 2 had died.

But all 7 are listed on the census. I have identified the 2 who had died before the census. They are:
Dorothy Manley and William Edgar Manley. I have found the Births, Baptisms, Deaths and Burials for both of these children. Dorothy died in 1904 aged 20 Months and William Edgar died in 1906 Aged 3 Months.
To top it all, they are both listed as at School!

I considered that Stanley might have not understood how to complete the census but he seemed to get the number of children born alive correct and the number still alive and those who died.

Has anyone seen anything like this before?


Pat