First thing to do is throw that wax ring with the plastic flange as far as you can. These cause problems and do no good whatsoever. Next thing to do is throw that inside fit flange the other direction so that the two will never meet. You indicate that you know these are not recommended because they cut the inside diameter of the pipe too much. Now get the flange that fit on the outside of the pipe, chip out enough concrete to allow the flange to fit over the pipe. Make sure the flange rests on top off the finished floor...NOT the sub floor. Anchor the flange to through the finished floor and into the sub floor. When you are ready to install the toilet, use a conventional wax ring. All of those things you threw away are gimmicks and are never used by professional plumbers. Just because they are sold, doesn't mean they are any good.