New popup windows on Google Chrome for Windows are always the full screen width

New popup windows on Google Chrome for Windows are always the full screen
width

I have a site http://bizfriend.ly/lesson.html?1 which requires several
popups of specific widths. I cannot get the predefined widths to work for
Windows versions of Chrome. It works fine in IE, Safari, and Chrome on
Mac.
After step two in the instructions, your screen should have two popup
windows next to each other.
The following function is called by a jQuery click function. Again it
works fine all browsers except Chrome on Windows.
function _instructionsLinkClicked(evt){
var url = 'instructions.html?'+lessonId;
var width = 340;
var height = window.screen.height;
var left = window.screen.width - 340;
instructionOptions = "height="+height+",width="+width+",left="+left;
window.open(url,"instructions",instructionOptions);
}
An interesting clue, when the 'Restore Down' button is clicked, the window
reduces to the correct size I want, yet at the wrong location.