Hi July
This is really three separate things here, so I see why it's giving you trouble.
- Changing permalinks
- Changing what category a post belongs to
- Redirects
When you do one of the above, it does not do the others automatically - for example, changing a permalink will not change the category or add a 301 redirect (by default - although some systems might add the 301 automatically).
So let me explain each one step by step. Realize they are three separate things normally.
1. Changing The Permalink
This is changing the URL. If you wanted to change for example
That's one step. Now. Some plugins may add a redirect for you. So. When you change your permalink
- try visiting the old permalink
- if it redirects - you're all set - you don't need to do a redirect yourself.
- if it does not redirect, you either need to use the redirection plugin or write the redirect in the .htaccess file.
2. Changing What Category The Post Belong To
Note, this is entirely different from just changing a permalink. You need to go to edit that post itself and select your preferred category for that post. This is assuming your not creating any new categories or deleting old categories. You're just moving posts around to different categories.
Then, when you move a post into a different category and remove it from the old one, it will show up under the new category archive.
3. Redirects
As mentioned - these may or may not happen automatically when you change a permalink. I usually prefer them to NOT happen automatically.
This is why it's best of course to decide the final permalink for a post before you hit publish as it's much easier to not have to go back and edit it.
Please let us know if you're still having trouble - thanks!
-Dan