I have a 2018 Specialized Allez, with Titanium 'Hollow Ti' saddle rails. To secure them to the seat post, there are two bolts opposite each other that both clamp down the same upper plate onto the lower plate that hold the rails in place. There is also a marking for 10 newton meters at the top of the seat post. My question is, is there a proper way to secure these bolts? (What I'm bearing in mind is that the upper plate is being affected by two different bolt tensions simultaneously).
I have had the saddle slip back during a ride twice now, only noticing when my position on the bike feels off, resulting in slightly scratched up saddle rails. I have also treated the 10nm rating as a maximum, and therefore usually tighten to 8nm for each bolt. Sometimes one feels a bit easy to turn while the other can feel like it is being forced, which is why I ask if there is a proper way to do this.
There is nothing applied like to the saddle rails (like grease) that might make it slip.