When switching to the Emoji Keyboard, it switches over to next keyboard when tapping the keyboard switch button

Greetings, Isaius35.

I see that, when switching keyboards, the next keyboard in the list is selected instead of the Emjoi keyboard you chose. I'm happy to help.

Restart your iPhone, iPad, or iPod touch -- Restart your iPhone. Once it's returned to the Home screen, test the issue for a bit.

How to back up your iPhone, iPad, and iPod touch -- If restarting your iPhone didn't resolve the issue, please be sure to have a fresh backup to keep your personal information safe. In order to back up your Health data, the backup needs to be encrypted. iCloud does this automatically, but iTunes doesn't. If you'd like to use iTunes to back up your iPhone, refer to this article: About encrypted backups in iTunes

If you can't update or restore your iPhone, iPad, or iPod touch -- When an application isn't working as expected, a good step is deleting and reinstalling the app. Since this isn't the "fault" of any particular application, I'd like for you to reinstall iOS. The section titled "Put your device in recovery mode and set it up again" will walk you through all the steps to reinstall iOS software on your device. 

Let me know how that goes, and take care!