a1:You can right click on a signal and edit name and width.
a2: Connect your 3 LUT signals with a bit longer wires to the bus, then pick wire by wire and again use "edit name and width"
I see now! Thanks
So when I attach a wire to a block with a bus input or output, the wire is automatically a bus.
Then when I create wires to connect the bits on the other block they are also bus wires, which causes the error, until I go tell them to be single bits, and which bit to be.