template style

Hi,
I have made a website with this template that I will call main website as shown here:
www.strumentiaccessorimusica.it/index.php
I have made changes to meet my client requests and I'm happy with the result.
Now I have to make many sites in the main site with different styles according to the colours of the brand I have to develop as shown here:
www.strumentiaccessorimusica.it/index.ph...arre-salvador-cortez
and here:
www.strumentiaccessorimusica.it/index.php/home-xdrum

now I have used the default style1 (template.css) for the main site and style3 for the second one and again style 1 for the third one and style3 for another one.

Now I have some problems: the slide height is not the same as the main website even if I made the same measures in the back end.
in this one I don't have submenus even if I have made them:
www.strumentiaccessorimusica.it/index.php/home-xdrum

moreover I would like to know if it's possible the make as many as styles I need to do other sites in the main site with the same structure but different colours. Should I make a copy of the template and work on it? Or copy and paste and rename the style2.css in style5.css, style6.css....

Thanks in advance, best regards.

About menus, you can not use minus sign for menu name "main-pasha" change - to _

ok but in xdrum the menu name is ok but I can't see the submenus.

the urgent problem is the size of the slide that is not the same as the main one even if I have applied the same sizes.
thanks

It looks it is named "main-pasha"