If a pin is connected to a label, but the label is only used once, then the pin is still unconnected.
The hint is in the 2nd ERC error: Global label not connected to any other global label.
If you want to keep the global label for clarity, but have no place for the wire to go to, then add another global label with a no connect flag, like so:
The: Pin connected to other pins, but not driven by any pin is another sort of ERC error.
For these you have to use the PWR_FLAG symbol, or it can be generated by a net that only has inputs, and no output to drive them, just like the text says.