The not driven error is because kicad checks every net that has a power input pin on it for connection with a power output pin. This is to reduce the chance that you forget to power your pcb. See ErrType(3): Pin connected to some others pins but no pin to drive it for how to deal with it.
The pin connected to multiple different nets message is however more concerning. It looks like you have the same pin multiple times in the same symbol. In this case with the pin number ~. So something is wrong with the DS1 symbol. Read How does KiCad know which symbol pin represents which pad of the footprint?