Still no dice with v1.0.0.1.
I tried right from my prior save, I tried after played a few online missions, then I tried after changing as many settings as I could. I also tried with single player and split screen co-op. All had the same result of wiping mission progress and not being able to modify the Limit.
Save: http://www.mediafire.com/download/5v...Callaway-2.rar
Thanks Idle!