Unfortunately I realised this AFTER "paying a fair price" for your FLAC files.
That in your videos/audios it's not that the left and right channel play at different frequencies. 
Because if they did, I would stop hearing the "wobble" if I heard it from only one ear.
But that's not the case. I here the wobble from one ear too, or from the phone speaker (better example).
Doesn't that mean it's not a binaural beat, but a normal beat?

TL:DR Why can I hearing a wobble when I'm just listening from one side of my headphones?

Final EDIT: Alright I tested it again and again, despite hearing a wobble out of one ear. I realised I was mistaken about there being a fault.
On further inspection, the separate channels have wobbles(slightly different in sound) because the base frequency low enough to sound wobble-ish. 
But putting them together, there indeed was a third "beat" wobble that I could hear.
Keep it up, Jody!
Cool, thanks for your purchase! :)
I suspect your device (or your headphones) might be mixing the channels together. Make sure you have any filters/enhancers disabled, and/or try a different audio player.
The tones in the FLAC files are definitely discrete and separate, there should be no discernible "wobble" when listening to one earpiece.
In the next couple weeks I'll create an annoying sound test to ensure your headphones are providing proper stereo separation. :)
Varun Gawande