Below is a older thread on piston/rod orientation. Please look at the diagram on #32 of the link. Looking at your pictures it looks like some rods are numbered on the oil spurt hole side of the rod and others are solid side of the rod and maybe that's why the engine got assembled the way it is. You might want to verify that the correct numbered rods are in the cylinder that it should go in with the oil spurt holes (bearing tangs) oriented properly.
https://www.google.com/url?sa=t&sour...9pZW-iOF2D4Eos