In styleproducts.css you have:
.menu ul { float:right; padding:0; margin:7px 30px 0 0; list-style:none; border:0;}
.menu ul li { float:left; margin:0; padding:0;}
.menu ul li a { float:left; margin:0 1px 0 0; padding:15px 0; color:#c8c8c8; font:normal 11px Arial, Helvetica, sans-serif; text-decoration:none;}
.menu ul li a span { padding:15px; margin:0; background:none;}
.menu ul li a:hover { color:#60b6ff; background:url(images/r_menu.gif) no-repeat right;}
.menu ul li a:hover span { color:#60b6ff; background:url(images/l_menu.gif) no-repeat left;}
.menu ul li a.active { color:#60b6ff; background:url(images/r_menu.gif) no-repeat right;}
.menu ul li a.active span { color:#60b6ff; background:url(images/l_menu.gif) no-repeat left;}
And in stylehome.css you have:
.menu ul { float:right; padding:0; margin:7px 30px 0 0; list-style:none; border:0;}
.menu ul li { float:left; margin:0; padding:0;}
.menu ul li a { float:left; margin:0 1px 0 0; padding:15px 0; color:#c8c8c8; font:normal 11px Arial, Helvetica, sans-serif; text-decoration:none;}
.menu ul li a span { padding:15px; margin:0; background:none;}
.menu ul li a:hover { color:#60b6ff; background:url(images/r_menu.gif) no-repeat right;}
.menu ul li a:hover span { color:#60b6ff; background:url(images/l_menu.gif) no-repeat left;}
.menu ul li a.active { color:#60b6ff; background:url(images/r_menu.gif) no-repeat right;}
.menu ul li a.active span { color:#60b6ff; background:url(images/l_menu.gif) no-repeat left;}
these two css blocks are causing the issue.
