First of all, when using the drag/drop feature this line should disappear from the smilie manager once there is a smilie added into that category. Currently, it does not. Also, it should probably be static directly under the category. As it is now, you can drop an existing smilie above or below this phrase, either one.
Second, you can also drag/drop the line containing this phrase. In fact, you can even drag it into a completely different category if you'd like. Again, it should be static.