Welcome to Wave sailing!
What you describe sounds normal and is probably not really a "problem" because only one end needs to swivel for the system to work. Mine came with the original failure-prone tendons so when I did the upgrade, the one-side-only-swivel sounded odd to me at the time as well. But that's the way Hobie engineered it, and it works.
from the installation/upgrade instructions:
Quote:
With the tiller crossbar, you only install a rivet in one of the holes. On the hole that is 1-3/16" from
the end of the tube, turn the tiller end cap so that it is facing down and align the small hole in the plastic
part with the hole in the aluminum bar. Thread the small sheet metal screw into the hole and tighten
down. This will allow only one side to spin while the other is stationary.
Full pdf:
https://static.hobiecat.com/item_attachments/1957z52.pdf?_ga=2.140680305.271904276.1500191227-991718453.1489732723