UITableView not showing left-side multiple selection circles on edit

I am trying to get the standard multiple selection behavior for UITableView as in the system Mail.app and Messages.app when edit is pressed in the inboxes. I am setting allowsMultipleSelectionDuringEditing to YES, and am calling [self.tableView setEditing:YES animated:YES] when my edit button is pressed. However, everything remains still and the open circles do not emerge from the left side of the cell as I want them to. I am not setting any of the UITableViewCells' accessoryType or calling setEditing on any of them as it is.

Is there anything I am missing, or something further that I have to do? To be clear, I am looking for the left-side multiple selection functionality, not the floating checkmarks that might appear on the right side of the cell. Thanks