Add issues for a couple of incorrectly applied styles

Author: jakearchibald

css-view-transitions-1/Overview.bs

@@ -292,9 +292,11 @@ urlPrefix: https://html.spec.whatwg.org/multipage/rendering.html; type: dfn;
 		}
 		```
 
-		Note: In addition to above, styles in the [=document/view transition style sheet=] add ''isolation: isolate'' to this pseudo-element
+		In addition to above, styles in the [=document/view transition style sheet=] add ''isolation: isolate'' to this pseudo-element
 		if it has both ''::view-transition-new()'' and ''::view-transition-old()'' as children.
 
+		Issue: This reads like a non-normative note, but it's normative. This rule should be specified at the same time as other styles, when the condition above can be determined.
+
 		Note: The aim of the style is to position the element to occupy the same space as its ''::view-transition-group()'' element
 		and provide isolation for blending.
 
@@ -325,9 +327,11 @@ urlPrefix: https://html.spec.whatwg.org/multipage/rendering.html; type: dfn;
 		Note: The aim of the style is to match the element's inline size while retaining the aspect ratio.
 		It is also placed at the block start.
 
-		Note: In addition to above, styles in the [=document/view transition style sheet=] add ''mix-blend-mode: plus-lighter'' to this pseudo element
+		In addition to above, styles in the [=document/view transition style sheet=] add ''mix-blend-mode: plus-lighter'' to this pseudo element
 		if the ancestor ''::view-transition-image-pair()'' has both ''::view-transition-new()'' and ''::view-transition-old()'' as descendants.
 
+		Issue: This reads like a non-normative note, but it's normative. This rule should be specified at the same time as other styles, when the condition above can be determined.
+
 		Note: ''mix-blend-mode: plus-lighter'' ensures that the blending of identical pixels from the old and new images results in the same color value as those pixels.
 
 		Note: Additional styles in the [=document/view transition style sheet=] added to animate these pseudo-elements are detailed in [=setup transition pseudo-elements=] and [=update pseudo-element styles=].