Yeah, it extends 2¾u to the left of the touch typing center (between G/H keys), whereas it extends 3¼u to the right. They should have shrunk the key down to 5½u or smaller, and pushed the right side inward a bit.

I assume the 6u spacebar was just the size they could find.
To be fair, the whole keyboard design extends too far to the right. Blame IBM.