post category url…

Hi,

I have set up a blog.
littletreebeijing.com for my mother.

on her blog (news) once I start going into her “categories” the url keeps building up instead of refreshing.

For example:
If I am deep in the categories:
http://www.littletreebeijing.com/category/latest/ennin/research/
and i want to click on “Latest” to go back to
http://www.littletreebeijing.com/news,
BUT I am only taken further into
http://www.littletreebeijing.com/category/latest/ennin/research/news

Why does my url in the category not clear and just keep adding?
and since there is no such page,
it comes to ERROR 404 – PAGE NOT FOUND

For some reason I feel like this is do to having a static home page?
Please advise!
Thank you!

Meekr