When you a select a category to view it'll come up blank, you have to select a difficulty now to view them.

Go to filter - Difficulty, then "any" will show all runs or you can choose a different option to specify which difficulty you wish to view.

Highest below ultra hard - Any runs played on the highest difficulty below Ultra Hard. For some quests this will be extreme, and some other only go up to Super Hard. Ultra Hard - Any runs played on the Ultra Hard difficulty, released in Episode 6. Any Difficulty - Any run played on...pretty much any other difficulty that isn't mentioned above.