In my opinion CHS should paste everytime the row, which is highlighted. If I paste something, the next row is highlighted. If I want to paste the same row once again by clicking on the button to paste in the last active window or by clicking the row, the wrong clip is pasted.
So in practice it needs everytime before any other action a click in the row to have the right one selected. After the first paste action I am confused if the highlighted row or the row which was highlighted before, or pasted before, or some other row will be pasted next.