I'm not sure, since I have never made them, but I think this is how it's need to be read.
As I see it, the body is made from a cylindrical shape. So when you check the body part, the last triangle need to be put in the first triangle (as far as I know those molecules have 2 pockets) So basically each row is a circle and you built on them.
Dunno if this is completely correct but seems most logical to me

Can't help further though.