Yep, this is normal. They are imprinted on you as "Mom". They will be more interested in each other next year, especially if they are a pair. Sebby's are a very people friendly breed and will probably always prefer being near you. Our girl would often sit looking at us through the window...
These chicks hatched last year on Easter Sunday. They have grown up to be very pretty, friendly hens named "Ashes" and "Powdered Sugar" they are Maran/Olive Egger mixes.
Emdens, "Charles and Petunia"
http://www.amazon.com/Petunias-Christmas-Roger-Duvoisin/dp/0394808681/ref=sr_1_11?s=books&ie=UTF8&qid=1368904362&sr=1-11&keywords=petunia+by+roger+duvoisin
This is "Ms. Goosey", my first Sebby! We had other much loved geese years ago, Emdens "Petunia and Charles" She is very sweet and friendly. It is so nice to have a goose in the family again.
...when you consider taking your newest awesome chicken , or cute baby chick , to show off at work, and can't understand why everyone wouldn't want to have a pet chicken in the office , and really hate it when some jerk at work thinks it's funny if he asks if you have brought in "lunch"