http://zctut.com/other/tiletest.qst
1. Spinning Tile (Random) combos do not work at all. They just sit there, taunting you.
2. Spinning Tile (Immediate) combos, or rather, the resulting enemies, do not use the graphics I set for them in the enemy editor. I am not sure exactly what they use, but you can see for yourself in the test quest. (Although, in the test quest, they're currently set to be Random)
3. I don't know for sure, but Random Spinning Tiles may have the same graphical issue as the Immediate ones. Can't test this, though.