Browsers Display Theme different

[shadowla05]

ok this is a hard one but ill try to explain,so i been trying to install a theme using safari and it does not display the theme correct.but i changed to firefox and i am able to see the custom theme fine so now on firefox i try to view the default theme and it does not display correct. so then i go to EI and the default theme is working fine so i change to the custom theme and it looks good but when i try to go back to default it wont display correct.

so basically i have to switching between browsers to view difference why is this happening please any one help me i cant figure why this is happening.