Multiple Widget Problem

I am trying to use 8 widgets in different areas in my theme. I have registered the widgets in functions.php which look like this:

<?php

//register widgets
register_sidebar(array('name'=>'Banners 1',
	'before_widget' => '<div id="banners-1">',
	'after_widget' => '</div>',
	'before_title' => '',
	'after_title' => '',
));

//register widgets
register_sidebar(array('name'=>'Sidebar 1',
	'before_widget' => '<div id="sidebar-1">',
	'after_widget' => '</div>',
	'before_title' => '<h3>',
	'after_title' => '</h3>',
));

register_sidebar(array('name'=>'Sidebar 2',
	'before_widget' => '<div id="sidebar-2">',
	'after_widget' => '</div>',
	'before_title' => '<h3>',
	'after_title' => '</h3>',
));

register_sidebar(array('name'=>'Sidebar 3',
	'before_widget' => '<div id="sidebar-3">',
	'after_widget' => '</div>',
	'before_title' => '<div class="somediv"></div><h3>',
	'after_title' => '</h3>',
));

register_sidebar(array('name'=>'Footer 1',
	'before_widget' => '',
	'after_widget' => '',
	'before_title' => '<h3>',
	'after_title' => '</h3>',
));

register_sidebar(array('name'=>'Footer 2',
	'before_widget' => '',
	'after_widget' => '',
	'before_title' => '<h3>',
	'after_title' => '</h3>',
));

register_sidebar(array('name'=>'Footer 3',
	'before_widget' => '',
	'after_widget' => '',
	'before_title' => '<h3>',
	'after_title' => '</h3>',
));

?>

Then in my pages I call these widgets one by one using:

<?php if ( !function_exists('dynamic_sidebar') || !dynamic_sidebar('Banners 1') ) : ?><?php endif; ?> and specifying the names accordingly.

Now the problem I have is that when I am in the admin area of my site I drag the widgets I want to use to the designated areas, but when I refresh or return to the widgets area later, my widgets have dissapeared or are in different widgets.

For example: I set a recent post widget in sidebar 1, only to find it in sidebar 2 or 3 later.

Am I registering my widgets incorrectly?