can you insert here the background the way you have it uploadeded in the portal?
Can you be more specifin what you mean with “overlay glitches”?
If it mean you see for milisecond the overlay big before it resizes or on another place before it shifts to the right place - it is bevause of wrong using of @ instead of & usually - I can tell more if I will see the code.
If the overlays apear on wrong layers - its usually caused by not setting all characters and overlays to layers - episode gives them in such case random layer which might apear different on different device.