Fiddle with the knobs....
Screenshots of problems are pretty useless unless they include the entire UI with the modified properties of the layers giving you problems revealed. Just press the U key twice, print screen (Ctrl/Cmnd + Shift + 3 on a Mac) and paste if you are using Windows or drag from the desktop so we can see what's going on.
There are lots of controls and the effects uses blend modes so you'll need to fiddle with the knobs.
Hi Code One Films,
Sorry for this issue. Did you ever find a solution? Please let us know if you have or if you still need help.
Sounds like they may have accidentally applied glow via a preset?