I think you’re getting confused by the terminology; this is an explanation from the Wikipedia article.
The terms right- and left-hand drive refer to the position of the driver and the steering wheel in the vehicle and are, in automobiles, the reverse of the terms right- and left-hand traffic.
ETA: So the red areas have left-hand drive and right-hand traffic, while the blue areas have right-hand drive and left-hand traffic.
OP said (and stressed with italics) that they have right hand drive cars but drive them on the opposite side, which was the point of his comment
I think you’re getting confused by the terminology; this is an explanation from the Wikipedia article.
ETA: So the red areas have left-hand drive and right-hand traffic, while the blue areas have right-hand drive and left-hand traffic.