Why can I no longer pair a mouse to multiple unifying receivers? It says that the receiver is paired to the mouse but only one of them will actually connect. I miss this because I have a unifying receiver for three mice, and an extra plugged into my laptop. So I like having my work mouse connect to the unifying receiver in my laptop, while still being connected to its personal unifying receiver. That way I don't have to connect a different receiver when I take my laptop home and use my mouse at home.