Thanks to all for your responses and my apologies, I should have said that the reason I favored the 1861 Census in Edinburgh is that my aunt said that Albert came from Edinburgh. That is why I didn't consider the Kent data to be likely. Also, Coldstream, Berwickshire and Cavers, Roxboroughshire are close to the English border. Both Thomas, the possible father and their first born Janet were born in England, whilst the rest of the children were born in Cavers, which suggests after marrying they lived with Thomas' family and after starting their own family they moved to Cavers.
According to my aunt, Albert was married to Elizabeth Campbell b1890, but I can find no record of there marriage.