When you right-click the "Saved lists" part of the "Saved" filter pane, the first two items in the popup menu concern filters, whereas the next five items concern lists. I suggest dropping the second item ("Save current filter as") and changing the first item from "New Filter" to "New List".

To be consequent, this should imply removing "Save current list as" from the popup menu in the "Saved filters" part of the same filter pane.