I am at a very basic level of web development capability. However, I built a site that was working fine until I attempted to insert a slideshow (using WOWslider) onto the site. This caused me to alter the css file for the site and for the superfish menu. When I did that, a navigation (slider) bar appeared to the right and at the bottom of the outer wrapper in addition to the slider bars normally seen in a browser window. The same appears on every page of the site. Now I can't get rid of those outerwrapper sliders.
I set the outerwrapper overflow:auto; but that hasn't helped. I looked for any padding that might be getting applied but didn't find any issues. I reduced the width of individual graphics, the menu and content one at a time but none of those had any effect. I'm lost so would appreciate any suggestions for correcting whatever it is I have inadvertently done.