Blender Guru's: How to Create a Professional Logo Animation. HELP!

Hello, I hope you can assist me. I’m currently working on my own logo animation. I’ve been aided by this video done by Andrew Price on Blender Guru.

He employs volume lighting and compositing in this tutorial.

I gave it a try, and I am currently at the point where I render the animation. However each rendered frames, has a ghost outline of the volume lit masked text.

Why is this happening, and more importantly, how can I correct it please? I’m grateful for your input. Thank you.