That kind of stuff never struck me as odd...it's just part of the narative, sort of filling you in on the inside "comedy", tongue in cheek.
I have a 1966 hardback edition. (It has that gorgeous green, blue, and black print of the Lonely Mountain on the cover) It was $3.95!
Anyway...those comments are just in parenthesis, and seem/are a part of the story, they never stuck out as odd to me.
The whole story is rather amusing, because Bilbo
is funny, a mind your own business, upstanding gentleman hobbit..... getting caught up in a dragon hunting burgluring adventure...hell, hobbits and dwarves are funny anyways...in a small smiling way.