The rod spinning won't affect the preload, the adjustment is on the threads so the closer the the nuts are to the actuator, the more preload you will have. It does look like the rod is bent in the first pic now you mention it, the only way I can see it affecting anything is if you can't get the correct preload due to the bent rod, other than that it shouldn't be an issue.
As sportstractor says, you need to get something to hold the rod while you adjust it, as for the rod spinning, I don't know whether it means you need an actuator or not as I didn't have this problem. For the time being I would adjust it as normal and see if you've got your boost back lol.