I found something interesting.. If you guys have time and are interested in this topic, you can read the article here.
http://www.rvsoa.net/tng%20oct%202004.htm It says:
If the impedance occurs in the penalty area, the punishment is an indirect free kick and NOT a penalty kick. A penalty kick is not awarded for impedance inside the penalty area. and this is what the referee said a couple of years ago regarding that infamous penalty claim. “I watched replays the following day, I made a mistake,” Ceccarini admitted to
La Gazzetta dello Sport this morning. “However, I would have awarded an indirect free kick in the penalty box. I don’t want to come off as arrogant, but that was obstruction.