Good. 13.24 Volts brings up the battery's surface charge. The reason the voltage goes down at each point you measured is probably entirely due to the surface charge dissipating.
This must be a typo or a bad reading.
As we expect. So far so good - except if that Alternator output connection reading is real - which the only way it could be is if its a loose connection and got worse when probed. Does that make sense? Everything in the main run should be at battery voltage.
View attachment 1715165769