in nthe topics list shouldnt the topics like Pedants' corner have both capitals as they are titles

[zippitippitoes]

..like Pedants' Corner

and Larger Families

and Telly Addicts

Not necessarily, it is a question of house style, so as long as the titles are consistent they can be upper and lower case or all upper. What you don't want is some done one way, and some done the other.