My contractor tried to pour self leveling concrete in the bathroom before tiling it with 32"x8" porcelain tiles. He ran out of concrete before he finished the job. The following day he continued pouring the self leveling concrete. The result is two layers of different height with a noticeable step between them. See pictures (tiles in the pictures are not adhered to the floor yet - just there so we can see the layout).
Can the floor be tiled in this situation or should I demand that he fix it by removing the 2nd layer or pouring another thin layer to make the floor flat?
Look at that first picture you have, where the tile goes from one layer to the next. You can see the gap under the tile where it transitions to the 2nd layer of concrete. Not good at all. You should be able to point that out and that should be enough of a reason to get it fixed.