Originally Posted by doug238
sometimes when a flange is cracked it also cracks in a place the you can not see when the tension is off the bolts. i am opting for this as your problem. if you replace the flange and have the new one sitting hard on top of the floor you will eliminate many problems. if you try to fix this problem you will be compounding the problem of a cracked flange and a flange set too high and your toilet is more likely to rock and leak again. do it right the first time and there will not be a second time.
now, what type of pipe is under the floor? what size? is it a concrete floor [i hope]? is it a pvc flange? is it glued to the inside or outside of the pipe?
remember to stuff a rag down the pipe while replacing the flange so no debris goes in the pipe, then remember to remove it.