I have come accross something slightly odd!

On the 1901 census I have an Edith A Rodger who was just 4 days old at the time of the census.
On the 1911 census I have the same family (even down to the same address in Castleford) but there is a 10 year old daughter on there called Annie Lister Rodger.
I can find no records of an Edith Rodger for the relevant time periods on
www.freebmd.org.uk, but I can find records for Annie Lister Rodger, right down to a marriage in 1925.
Is it possible that at the time of the census her parents hadn't decided on a name and registered her at a later date under the name of Annie Lister Rodger?
Any information would be gratefully appreciated and stop me losing even more hair!

Many thanks.
Martin.