Quick thought, do you think that after repeated exposure to the same frequencies night after night, the brain will adapt and begin to process the audio with each hemisphere simultaneously? Sometimes I don't here the wobble but I can clearly hear the two different pitches. I used to mix it up by swapping my headphones around every other night so my brain was getting tricked into working as intended. 

Has a year of listening to your tracks turned my brain into two brains!!!? Woah... I'm here every night btw.
Naw, as long as you still hear the wobble/pulsing sound, the effect is happening. :)
A. L. S.