If you push b button while charging animation is on, you will go to the standard menu which will soon turn off the back lights but still remain charging.
I don't understand what do you mean that buttons are wrong? Are they physically wrong or they are not configured as you want them to be in some emulators? If the first is the case, you can try to open the dingoo and change their positions. If the second is the case it depends of the emulator. By pressing start + select you can go to the menu of the emulators and you can try the settings and to change button mappings.