Solar Pathlight still being too sensitive with "Low Motion Setting"

1. I just bought a bunch of Solar Pathlights for my backyards. I set all of their Motion Settings to the "low", yet still got triggered by something... ghost? No one or anything was around the lights. I tried the customize motion, it won't allow me to save when I chose "setting 1", the lowest that I could save was "setting 2" which was even more sensitive than before. Now I had to turn off the motion feature for all of them. 2. Battery seems to drain too quickly. I charged them with USB to 100%. I live in southern California, they were all under full sunlight. But their battery dropped to around 80% before dusk. 3. Why solar devices like solar pathlight, solar stickup cam don't show "charging" anymore during the day? It used to work. And now I have no idea whether they are charging or not.