First button press locks with a beep, second will attempt lock again with beep but turns off lights. If I do it three times it does a honk which I'm guessing is for added confirmation in case you are ...
Yours seems like a reasonable configuration. Many cars honk every time you press the lock button, which is about as anti-social as you can be in a city. I don’t know who sets these configurations, but it’s not consistent across make and model. Sometimes I get a rental car that does that and it’s always trivial to disable