Not really a bug but more like a missing feature : to attach a wheel you need to have that object in your hand so how are we supposed to hold the needed tool in the same time. This is just like crafting who needs several step combining only one object to another, like arrows (sharpen, than feather, then bones). For now on we just can't use 2 objects or more to perform an action or craft because that how is the game is coded (or not coded depending on your point of view).