Definitely need to see the read out from the alignment. Camber except extreme amounts do not typically cause significant tire wear. Toe is usually the culprit. The center of the tire being more worn than the edges is typical of over inflation as noted above. Tire rotation is crucial to maintain even wear on tires but I can attest I am terrible about keeping up with it. I tend to burn through tires every 10-20k miles and usually forget to keep up with rotation but I also used to run slightly odd alignment specs because I autocrossed my focus.
