The two "bugs" you speak of are not bugs at all. They are default features of the UI (Sony, not Zonx).
Every window has the ability to fade into transparency. If you right click on your chat window, and select "Window Options," you will find a panel will appear with sliders for normal transparency, and mouseover transparency. It's possible that your default configuration was overwritten when you installed Fetish Nightfall, and you failed to realize it.
Secondly, Live Update 19 (LU19), has brought with it several changes to how the default UI operates. For example, you can now lock your hotbars in place, yet still move your spell/skill/item icons around within them. IF YOU DO/DO NOT WANT THIS, right-click on the hotbar and find the toggle named "Allow/Disallow Icon Movement" (or something close to that approximation), and toggle it on/off.
I hope this clears things up.
Oh, and welcome to the forums
