After I lost my corn snake (that was exactly like Hobbes and went missing like Hobbes) I got another but I did the same as you and oddly enough I got the exact same ones. A ghost and another Albino. I kept them together too (always fed seperate) and there were no problems. Now I had a huge tank and they had tons of their own hiding spots. The place I got them from (a huge reptile store) always had the babies and young corns in the same tank. Not saying it's right but I guess alot of people just don't know.

I would listen to Ramantha though as she seems to know ALOT about her reptiles and you are new to owning them.
I also want to say the place I got mine from the guy was very very knowlagable and bred corn snakes too and never sperated them so doesn't mean your breeder friends exactly know what they are talking about.

These were my guys