So, in that sense you did nothing wrong, except to follow the instruction.
basjoos' knowledge base is prolly equal to PK, aka aerohead; who originated the Template itself. Maybe come the weekend, we'll find out if this is a bug or a feature.
Meanwhile, for entertainment purposes, the question of why the Template is a half-body of revolution:
http://ecomodder.com/forum/showthrea...ion-23333.html
If 'twern't obvious; the reason the Beetle gets away with a 3ft boat tail is the plan taper starts at the B-pillar, not the rear axle line.