Clarified blog post instructions.

Author: kgodey

content/community/write-a-blog-post/contents.lr

@@ -62,12 +62,13 @@ Once you have written your post, you can either send it to us (Markdown is easie
   </pre>
 
   *Read more about [Markdown formatting here](https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet).*
-1. Each category you have applied to the post must have its own subdirectory in the [content/blog/categories](https://github.com/creativecommons/creativecommons.github.io-source/tree/master/content/blog/categories) directory.
-  * If there is no subdirectory for that category, create one using **the exact category name** as the blog post with its own `contents.lr` file within.
+1. Create category pages for any new categories that you've assigned to your post. Each category has its own subdirectory in the [content/blog/categories](https://github.com/creativecommons/creativecommons.github.io-source/tree/master/content/blog/categories) directory.
+  * Create a folder that uses the **the exact category name** as the blog post with its own `contents.lr` file within.
   * The new `contents.lr` file within should follow the same format as the other categories. Here's an [example category content file](https://raw.githubusercontent.com/creativecommons/creativecommons.github.io-source/master/content/blog/categories/gsoc-2019/contents.lr).
-1. Similarly, each author must have their own subdirectory in the [content/blog/authors](https://github.com/creativecommons/creativecommons.github.io-source/tree/master/content/blog/authors) directory.
-  * If there is no subdirectory for your username, create one using **the exact username** as the author field of the blog post with its own `contents.lr` file within.
-  * The new `contents.lr` file within should follow the same format as the other authors. Here's an [example author content file](https://raw.githubusercontent.com/creativecommons/creativecommons.github.io-source/master/content/blog/authors/TimidRobot/contents.lr).
+1. Similarly, if this is your first post, you'll need to create a file with author information. Each author has a subdirectory in the [content/blog/authors](https://github.com/creativecommons/creativecommons.github.io-source/tree/master/content/blog/authors) directory.
+  * Your author folder must have **the exact username** as the author field of the blog post and have a `contents.lr` file within.
+  * The `username` field in the `contents.lr` file should also use the same exact username.
+  * The author's `contents.lr` file within should follow the same format as the other authors. Here's an [example author content file](https://raw.githubusercontent.com/creativecommons/creativecommons.github.io-source/master/content/blog/authors/TimidRobot/contents.lr).
 1. Build the `creativecommons.github.io-source` project locally (instructions are in the `README` in the repository) and ensure your blog post shows up correctly locally. If you have not created the appropriate category or author files, you will see a build error in this step.
 1. Push your code and make a pull request.
 1. Wait for a member of CC's fulltime staff to merge the post into the `master` branch.