Leaking around base of toilet
	
	
		We are having a persistent leak around the base of our toilet.  First we replaced the wax ring.  Still leaked.  Then we replaced it again with a jumbo wax ring.  Still leaked.  I noticed the porcelain around one of the bolt at the base was cracked so we replaced the whole toilet w/ a brand new set up.  STILL LEAKS!  I'm going crazy here!  We did a pretty good job setting the toilet on the ring and felt a good "squish" on the wax when we placed it.  I sat on the toilet and rocked slightly back and forth to make sure it got a good even setting.  The flange seems to be level with the floor for the most part but I'll be honest that I didn't give it a super good inspection last time we had the toilet off.  The house was built in the 20's and has original drain pipes I believe. 
Any ideas for me?
Thanks in advance for any tips.