Hello. Thank you for contacting the Toolset support.
Tooloset Block/View is meant to display the content on the frontend and not in the backend.
Regarding sorting table columns you can sort it with normal fields like text, single field, post title etc..etc..
If you can share problem URL and admin access details and tell me where you are displaying the view in the backend I will try to check and see if I've any workaround on it but please note that there is no gaurenteed solution.
I checked and as I shared the views are meant to use on frontend. You can build the view in backend and display it on the frontend. I do not have any other solution at the moment.
I've not touch any other things or restore any database. I just login to your site and checked the settings you have and try to access the view in backend that is it.