Layout Problem In My Website.

Recently, I have launched my online store created by a profession. Little Genius Online (http://www.littlegeniusonline.com) he has used open source template to create the online store. However, I am not satisfied with the layout or design. For examples,

When I added sub-categories to the category,
No "Category Title" shown when the category is clicked;
Random New Products are shown on the category page when the category is clicked.

On the other hand, when sub-categories are not added to the category,
"Category Title" is shown on the category page;
No random New Products are shown but only the products of that category are shown;
A drop down list of brands available.

I would like to add sub-categories but I would like to show the "Category Title", No random New products and a drop down list.

Can anyone help me to modify the scripts or guide me to verify the problem?