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It's not an older version. Its a fresh, up to date install of KSP with a fresh install of KW rocketry, which I downloaded maybe 20 minutes before I took that screenshot.

Faring halves don't match up. So before you ask: These parts are all 2.5m expanded fairings. Placed the base, then the nose cone, then the fairing walls. Exactly like in the video. The same thing happens whether you are using the 1.25 or 3.75m fairings (expanded or not).