When we first activate a theme there is a sidebar display that does not contain actual widgets - it's just looks like it does. As soon as we go here > Appearance > Widgets and install any widgets the widgets we install override the default display.
Currently your widgets are displaying below your posts. Sidebars and widgets in them do not fall to the bottom and display below posts and/or posts do not appear in sidebars unless
(1) content has been imported into the blog
(2) the blogger has been copying and pasting content from elsewhere, without using either icon 5 or icon 6 in Row 2 of the visual editor http://en.support.wordpress.com/visual-editor/#pasting-text
(3) or the blogger has copied and pasted invalid HTML into a text widget or left an HTML tag open
See here for sorting this out > http://wpbtips.wordpress.com/2012/05/19/sidebar-at-the-bottom-and-related-issues/