It seems like 90% of all computer frustration comes down to one small detail. You get that one thing right that you were previously missing and suddenly, it all goes as smooth as silk.
Apparently, you can't use a header to start the new page that somebody else has used. For example, I kept using "Hobbies" as the title for my new page and somebody had already taken that for thier sub-page. I used "Martial Arts" and then, it was no problem.
For my other two sub-pages, I used "Literature" because Books was taken and "Cinema" because movies was taken.