Small clarifications

source

@@ -79848,8 +79848,10 @@ dictionary <dfn dictionary>ToggleEventInit</dfn> : <span>EventInit</span> {
    is a negative integer.</p></li>
   </ul>
 
-  <p>The order within a <span>tabindex-ordered focus navigation scope</span> is determined by each
-  element's <span>tabindex value</span>.</p>
+  <p>By default, the order within a <span>tabindex-ordered focus navigation scope</span> is
+  determined by each of its element's <span>tabindex value</span>. This ordering criteria is
+  sometimes overridden, as is the case with <span data-x="reading-flow-ordered focus navigation
+  scope">reading-flow-ordered focus navigation scopes</span>.</p>
 
   <p>A <dfn>reading-flow-ordered focus navigation scope</dfn> is a <span>tabindex-ordered focus
   navigation scope</span> whose <span>focus navigation scope owner</span> is a
@@ -80711,7 +80713,7 @@ dictionary <dfn dictionary>ToggleEventInit</dfn> : <span>EventInit</span> {
 
   <p class="note">As a <span>reading-flow-ordered focus navigation scope</span> is a
   <span>tabindex-ordered focus navigation scope</span>, it is flattened in <span>reading flow
-  order</span> into the <span>flattened tabindex-ordered focus navigation scope</span>.</p>
+  order</span> into a <span>flattened tabindex-ordered focus navigation scope</span>.</p>
 
   <p>If a <span>focusable area</span> is omitted from the <span>sequential focus navigation
   order</span> of its <code>Document</code>, then it is unreachable via <span>sequential focus