How does the Majesty led in the back work?

How does the Majesty led in the back work?

Hi,
When I’m unplugging the guitar, I get an orange led signal for about 1 second. Does this mean the battery is low, or is it just a ,,deconnection” sign? Also what does the led do, when the battery is going low?
One more thing. I get one blue flash when i insert a mono cable. I cannot change it by the Piezo poti Button. I guess I need a stereo cable, then I can switch between mono and stereo right?
Sorry but I couldn’t find any info here.
Last but not least, when I tighten the Tremolo arm screw, it works perfectly but after 1h or so it loosens again. How can I make it stay like I want it?

All the best
Andy

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