I'm wondering what the behavior should be on add. Currently, it goes back to the first page. But the selected sort column does not change, so unless the sort is the default, you don't see the added item. I would expect either to stay on the previously selected page or, if you go back to the first page, revert to default sort so you see the added item.

But on delete, I definitely like that you stay on the current page (and it is obvious that the item is removed).