mouse position shows in upper-left corner when taking a custom area screenshot

Observed behavior: Screenshot app, select option to preserve mouse position, take custom area shot, in the resulting screenshot, submenus are not highlighted as expected and the mouse is moved to the upper-left corner, not where it was hovering during the screenshot.

For example, http://i.stack.imgur.com/R4VVf.png

Expected behavior: Both window and area select should capture the space exactly as set up when the screenshot is taken, but at the very least, the mouse position should not move to the upper-left corner when the toggle indicates that the mouse position would be included in the screenshot.