Sorry, I misunderstood your issue. I think @RedLenai got you covered on that.
CSP's rulers will snap your pen to the ruler it's closest to so keep that in mind if you lay a lot of them down during construction or on your inking layer.
Its fine!
I found this out while messing around with them. Good thing to know for future reference
you can turn that feature off. it's on the shortcut panel across the top.
The shift click point thing?