Please help a newbie with blog page issue?

WordPress uses something called Post Types to generate different types of content.

The first URL belongs to a post ( default type ). You can access it under the “Posts” menu.

The seconds URL belongs to a post type called “page”, or simply a Page. You can access it under the “Pages” menu.

To achieve what you need, you can make a new post and copy the page’s content to it.

A better solution would be to setup pretty permalinks under the “Settings” menu.