You may need to adjust the margin and or padding settings of the content and footer areas. If these settings are wrong you can end up with large gaps or overlaps.
To adjust the content area margin settings, click on the Content tab at the top of TemplateToaster. In the Content settings block (left hand side), click on Content Properties button and place the curser over Margin on the drop down menu. The menu will then expand to show Top, Bottom, Left, Right. Move the cursor over Bottom, which then expands further to show various options in pixels to adjust it by. Clicking on More at the bottom of the menu brings up a dialog box where you can make further adjustments if necessary.
To check the Footer, the process is similar to the above but this time click on the Footer tab, Layout settings block, Margin, Top, Bottom, Left and Right. This time I suggest you check the Top settings. You will note that this has negative number options and selecting one of these moves the Footer up to the Content area. Too far and it will overlap slightly.
You may also need to check the padding settings.
I hope this helps to solve your problem.