It's pretty common for low cost stamped and riveted chain sets to have more lateral run out then more expensive cranks that are machine turned and cut. But even the nice stuff can Suffer from poor manufacturing or incidents that bend the rings (jam shifting being one). Rings can be aligned to a degree with localized bending efforts. 6" adjustable wrenches placed on the ring outer portion (that is the offending area) and/or screwdriver placed behind the ring "bolts" and wedged against the RH BB face are two methods to bend rings/cranks straighter. Do know that with much leverage much damage can happen Andy