Kohler toilet leak at base

A have a customer that called about a kohler toilet that had a bit of water coming out between the toilet and the floor. He already had 2 plumbers before me, both of them double the wax ring with the second plumber taking out the plastic attachment(funnel) to the other wax ring and putting in 2 flat rings.
I pulled the toilet and the flange was above the finished floor and seemed fine. The floor wasn't level and the toilet tipped a little bit to the right, I shimmed it and got it level. I replaced the wax rings, tightened down the bowl, flushed the toilet and it seemed alright.
I got a call the next day from the customer, he said that a small amount of water was coming out the front.
My question is.... has anyone ever had a flange that leaked from the side or have the bowl of toilet have a hairline crack that could possibley be causing this problem.

I'm recommending that we open the ceiling below, cut back the 3" line, install a new 90 and flange.

Any thoughts.
Thanks,
J

A cracked toilet is a possibility but hearing that plumbers were using 2 wax rings makes me think that the flange is not set on top of the finished floor like it should be...

You have 4 options. the 1st 2 are inexpensive and work well. The 3rd is expensive and works very well. The 4th is most expensive and also works well given enough time.

Option #2: Use a spacer like this below the flange to raise it to the proper level.

Option #3: Reset the flange at the proper height and use 1 wax ring.

Option #4: Use 2 wax rings, have them leak, then reset the flange at the right height when you are replacing your rotted out floor.

Take your pick! Oh its a new floor you just put in... I guess option #4 just isn't all that viable. I would recommend using the spacer rings.

If you have the set the bowl properly, and it still leaks, check the bowl for a hair line crack. It happens.