Brand new toilet replaced Flange tried 8 different was seals and we cleaned it prior to trying a new one toilet does not move at all, and we have also tried a double wax seal it is still leaking at the back of the base it seeps out, the only other thing we can think of is the toilet has a hairline fracture somewhere in it? Any ideas?

Does the toilet leak only when flushed or does water seep out the back when it's not in use.
Back to you, Tom

Are you positive that water is not leaking from the tank at one of the tank to bowl bolts? I find that a lot. Especially if anyone leans back on the tank when sitting on the throne. What about from the supply tube or the packing on the stop valve?