You may have the wrong remote. There IS balance control on the DS, and the controls are at the very bottom left of the remote. Two buttons, marked “L” and “R” and “Balance” is printed under the two buttons.
On most of our remotes it says “balance” in the lower left hand corner. I think we’ve had two different types. You can email me a picture of yours and I’ll point it out.
Here’s the one I believe we are currently shipping.