AHa! you beat me to it. I wish I had seen this earlier, because I've just reported the exact same issue ;)

I'm a lefty too, but I've gone with TFGH instead of WASD or IJKL (im guessing you went with the 'J' key because it usually has a little ridge on the surface of the key [as well as the 'f' key] that your index finger rests on so you can find it without looking; same reason I went with the 'F' key)

But I agree, i've spent hours tweaking controls, only to find I have to do it all again when I create another profile (which i'm only creating because I can't change the name of my default profile).

A save control preset would be a very welcome addition, especially in the lefty community ;) Glad they're looking into it.