HI Fotis,

Yes, the root category used for the data source is ordered the way we want it. However, there are template overrides in the template.
I'm not sure which files to grab for you, but I grabbed the beginning of the category.php override which contains an ordering switch and have uploaded the screenshot. I'm not sure which would be the correct syntax to use if I changed it, but I do note the following in the default:

$orderby = 'i.id DESC';

Would that be the cause?
Further down in the file, I see a div for what looks like a category filter pulldown... which is the second screenshot attachment.

Hey Fotis! Thanks so much, yes, I had a hunch that the override was the problem. I added your query code at line 144 and it worked! Thanks for sticking with me. Much appreciated!