Jazzyvee,
I'm not sure when the extra strap button was added. It was there when I bought it but I will say that after trying both positions, the higher position helps keep the bass pulled in and helps a lot with the neck diving down. I have got used to the balance and now rarely notice it much. I do find that the adjustment I had to make to counter the balance does at times cause me some back issues but most of the time the problem is minimal. If you like, I could give you the exact distance from the lower button if you wish to give it a try.
greg