If you want to display the collections in a specific order, one work around we’ve used is to create a navigation menu that links to each collection arranged as you’d like them to appear. To do this go to Online Store, Navigation and click Add Menu. Give the menu a title of All Collections then +Add menu item for each collection and re-arrange into the order you’d like them to display.
Then in main-list-collection.liquid replacing the {%- for collection in collections -%} with the following code.
{% for link in linklists.all-collections.links %}
{% assign collection = link.object %}
This will make the All Collections List display the collections in the order you set for the navigation menu.
Hope this helps
Simon