So, the tutorial for the Arena PvP area says that models of the same type will be automatically combined to make stronger levels, and this isn't happening. I've also tried dragging and dropping models on top of each other, and that isn't happening. I've tried clicking on a model and then clicking on another creature of the same model (it does show a star symbol instead of a ‘switch’ symbol), but that doesn't seem to do anything.
Am I missing something, or is this a bug?