I have the 2385, was resetting on power down when out of box.
Reset button is inside SD card cover, there's a rubber gasket on the cover that I suspect was pressing button. Takes some care to seat the gasket properly, but this done settings are now retained on power down.
Night vision does seem better vs hikvision ds-2cd2342wd-i 4mp with same 2.8mm lens, street lighting around 30-40m away with lens aimed to avoid flares. I'll try to get some time to pull identical images.
Day vision definitely seems to work to lower lux On the 8mp, considering trying some LED tape lighting to see how much I need to keep the area lit although suspect it may need too much.