<…> still see some wired behaviour on that tab (it's impossible to unfiltered a column, once you select a sorting criteria).
I really don’t have much control over the sorting capabilities. I’ve played around with the sorting capabilities on the tab for a while, and I’m not sure exactly what you are encountering. If you’d like to provide a user case, so that I replicate the behaviour, I’ll get a better grasp of the issue.