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Making a list parallel affects whether its actions are all available (black) or whether all but the first is blocked (gray), but the top action in the list is still highlighted as the single "next" action (purple).

If you'd rather not visually distinguish between available and next actions, you can change the styles in Style Preferences so they match: just drag the style for "Actions" over the style for "Next Actions" to make them all black (or vice versa to make them all purple).