Do the 'group tuning' muzzyman and bgfisher suggest (I call that method 'walkback' tuning and it's my bread and butter for fine tuning centershot). It's a great fine tuning method, the next step beyond paper tuning. In fact, I just eyeball my centershot, set my nock at a hair over square and go straight to walkback tuning. I quit messing with all that papertuning stuff some years ago. A waste of time and effort - maximum frustration for mediocre results.

The bit about your problem starting only after bumping your draw weight up to 60 pounds? I agree with the others. That sets red flags to waving, flares ablazing and sirens going off about arrow spine. Try dropping back to 55 and see if the problem clears up. If it does, it's a pretty fair bet you need to get the next size stiffer spine. If you're shooting carbon arrows and are close enough to the edge for a 5 pound bump to mess you up that bad, you need to go stiffer anyway.

Just for the record, how about listing your entire setup. Bow - brand and model, cam, draw length; Arrow - brand, size, length, tip weight. With that info, maybe we can make some specific recommendations to help you.