The issue is their diagrams really only apply to their carbon bars it seems. Their aluminum bars may have the same names but are definitely shaped differently than their carbon counterparts. The first picture in this thread does suggest that they are trying to fix that though.

I know the aluminium bars in the correct shape exist. Maybe like you say they've changed the shape to be more 'traditional' lately, and lots of companies are still selling stock from a while back?

Annoying this hasn't been addressed though because now I've got to play poker to try and get my hands on the right shaped bars.

Zipps naming of their bars is really confusing.......