Cory, I tried approaching this from a different direction. In this first message you said that two of George's siblings also went to Canada, so I had a look for them on one of the websites which record the British Home Children.
http://freepages.genealogy.rootsweb.com/~britishhomechildren/iomrecords.htm
SURNAME First Middle Birth Place Ship Date Age
SAYLE Emily 1883 IOM Carthaginian 1893 10
SAYLE George 15/06/1872 IOM Peruvian 1885 13
SAYLE John William 07/02/1899 IOM Hesperian 1914 15
SAYLE Mary Jane 1880 IOM Carthaginian 1893 13

Emily b.19 Apr 1883 Douglas is on that list of birth registrations I posted in an earlier message.
Mary Jane b.1880 will be the child with James and Harriet in the 1881 census who you found, aged 1.

George's birth date here is given as 15/06/1872, but I stress that these are transcripts and always need double-checking.

The information you got from Quarriers aftercare, if by email, would also have been a transcript. Could someone have copied the parents for Emily and/or Mary on down the list and given them to George as well on their database, in error? Were his parents given anywhere else at that time?

Are you able to look at the original records of the British Home Children if you have not already done so, or the original records copied to film or fiche? - Just to confirm that you have the correct parents for him, and not depending on what someone else has recorded from his original emigration/ immigration/ passenger/ children's home records.

Sue