Well...no it supports two. Mines litterally sitting on my desk right now plugged into 2 screens and has been for ~4 months. A you issue doesnt make it an issue with the product ;)
Sure but can i do 2 x usb-c to displayport? Every time I plug something via hdmi in my current mac it tells me its a tv. Fortunately being Intel i can use 2x usb-c instead.