Might sound silly angrybird, but have you tried sittin in the home screen and pressing the inventory button (used to be called back/select)? This should recentre the screen to your current viewpoint, including if your head is tilted left or right.
You can also try running the configurator again if you havn't already. I mistakenly skipped that part in the excitement. It's in the oculus menu (the cog - top right) on the desktop app, under the devices tab/option.
You may also have something between the sensor and your headset, e.g. the edge of your monitor or a desktop speaker. Also check the sensor is the right way round, with the cable running down the back along with the side that says 'oculus', while the smooth and shiny side is facing you. The sensor can also pivots at the neck.
Hope you get it fixed!