I concur about the spine issue. However there is a little trick you can try that's less expensive than replacing your arrows. Put a thicker side plate on the bow. That will make the bow less centershot and the softer spine will match up better with it. It'll take some trial and error to get the thickness just right, but it'll be worth the effort.
I would also go to 4" feathers for carbons. Until you replace the feathers though, try orienting your cock feather straight up, to make the hen feather pass through the angle between the side plate and arrow shelf. That might help keep the feathers from bouncing the tail of the arrow to the left when it leaves the bow. In fact, I would try this even before replacing the side plate. Just in case.
