When you put the multiple bodies in a single part, the bodies automatically share topology. This means shared nodes on a face that is coincident between two bodies. This was working in my small one-turn example where four bodies shared nodes on common faces.
I don't have the CFD experience to comment on the extreme skewness, but 99% of your elements have good skewness, is that enough?
I have added inflation back into the 45 turns portion of the model. You chose to make on body do 45 turns, rather than make a pattern of 45 instances of a one-turn body. That has some negative consequences. Look at the difference in the skew of the double helix in the 45 turn vs. the one turn geometry.
Look at the far end of the 45 turn body and compare it to the front end where the inflation was defined. This change wouldn't happen if you copied the one-turn body down 45 times since the start face would have to match the end face each time.
Attached is the 45 turn geometry with the inflation layers defined. I only have the mesh.
You can add on a Fluent System if you like, but delete Fluent (B) before you archive it then you can attach the archive to the post.