This does look like the same family, and you are right....I do have questions! Do you have anything to verify the place of birth for Alice? Using her marriage certificate my Alice Boulton was born in 1859 and her father was 'Joseph' and he was an 'Engineer'. On the IGI I can locate an Alice BOLTON born 25 Dec 1859 at Adwick Le Street, Yorkshire, daughter of Joseph and Elizabeth BOLTON.
I only have six children through to Joseph.I had wondered if they had held out for a son after all those girls and when Joseph arrived, whether he the last child. I note that you list a 'Florence' which I did not have, but I DO have a 'Jessie' born 1872.This I obtained from the IGI.
It is really good to hear from you, and I will take all the information you supply into account in my continuing searches. If indeed I have the right Alice Boulton/bolton, your great-aunt Alice married my g.g.uncle William Shea, son of Cornelius James Shea and Martha Ambler. Please keep in touch.