overriding template file of display suite layout applies on other pages
You can use hook theme suggestion in your template file. It gives you the right way of naming you tpl file.

function THEME_preprocess_node(&amp;$variables) {
  print_r($variables['theme_hook_suggestions']);

}

function THEME_preprocess_page(&amp;$variables, $hook) {
  print_r($variables['theme_hook_suggestions']);

}