Please post an active link starting with http:// to the blog wearing the Imbalance 2 theme.
Have you followed this guide?
An image gallery will display a set of thumbnail images attached to a particular post or page. When clicked, gallery images are displayed in a full-size carousel view. If you upload images using the Add Media button above the post/page editor, they will be attached automatically. If you want to include images that you’ve already uploaded, you’ll need to attach them to a post or page before they will appear in a gallery. http://en.support.wordpress.com/images/gallery/
Here's a link to an excellent resource for creating galleries > http://wp.me/p8gVp-L
Have you aslo read the Imbalance 2 forum threads so you understand how that theme is coded to operate?
Imbalance 2 offers two layout options, fluid and fixed.
Fluid means the width changes according to screen resolution (or the width of browser) your visitors use.
Fixed means the width does not change according to screen resolution (or the width of browser) your visitors use.
Column one is the blog title and tagline; you edit them in Settings > General.
Columns two and three are for two menus; you create and load them in Appearance > Menus - instructions here: http://en.support.wordpress.com/menus/
Column four is for widgets; you add them in Appearance > Widgets.