Reverb Goes to the left???

Can somebody please tell me WHY when I send a couple of tracks that are in my drum bus to an FX channel with Revelation on it and I MOVE the damn early reflection size knob to 0% THE WHOLE REVERB PANS ITSELF to the absolute LEFT. This is the first time I’ve decided to use REVelation and I’ve achieved a room sound I really like and I can’t figure this out. I apologize for the caps and if I’m violating forum rules but I am really pissed off. Thank you.