Search & Discovery - Reorder Value Sorting

[Mireta]

Hello, I'm working on a wholesale website which the default prices are for bulk.
1. I added a price metafield for the unit price

2. I added the metafield to filters in the Search & Discovery app

3. I grouped the prices as follows:
$0 - $5
$5 - $10
$10 - $15
$15 & Up

4. The filter displayed in the collection but it displayed in the wrong order:
$0 - $5

$10 - $15
$15 & Up
$5 - $10

How to change the sorting to display in the correct order?
$0 - $5
$5 - $10
$10 - $15
$15 & Up

Here is a screenshot:

I'll appreciate your help.

Thank you!