Comment on WordPress Widgets Tutorial by SEO Dave.

WordPress SEO Widget Add two widgets to the same sidebar and all should become clear :-)

When you add a widget for the first time it ‘resets’ that sidebar so rather than adding one widget to the current sidebar widgets, you are starting from scratch.

Means you can build your two sidebars with only the widgets you want and not the ones the theme author thought you’d want to use plus the ones you choose.