PLi's enigma using 2 users xml: one is common for ALL skins and it is skin_user.xml. Second is specific skin_user_nameofskin.xml.
skin_user_nameofskin.xml has priority and when is presented feg. for PLi-FullHD skin, then skin_user.xml is not used for this skin, but is used for all others skins.
Yes and that is a problem if you have things in your own skin_user.xml, e.g. for the layout of the LCD display.