Reminders is shuffling my list

Hello Meltflow,

Welcome to Apple Support Communities. We would suggest using tags to organize the Reminders on your iPhone. Get the guidance you'll need for this in the Apple Support article: Organize reminders on your iPhone, iPad, or iPod touch - Apple Support

Create a tag

1. When creating or editing a reminder, tap the Tag button  in the quick toolbar.

2. Type a keyword. A tag can only be a single word, but you can use hyphens and underscores to make longer tag names.

You can also add a tag directly in the reminder by typing the # sign. Look out for tag suggestions, including those used in the Notes app, above the keyboard as you type.

Tags are available only for reminders that you've created in your iCloud account.

View reminders with certain tags using the tag browser

Any tag you create is automatically added as a button in the tag browser, located at the bottom of your lists view.

Just tap one or more tag buttons in the Tags section to view tagged reminders across all of your lists. If you select more than one tag, you'll see only reminders that include all of the selected tags.

The tag browser shows all tags currently applied to your reminders. If a tag is no longer being used, you won't see it in the tag browser.

Feel free to reach back out if you have any questions.

We hope this helps you.