I can't agree in part. The commitment to not sin again doesn't mean that the sinner won't sin again. Christ's atonement is endless. Peter denied Christ 3 times. Should he have only been forgiven for the first one or two?
I never implied what you are suggesting. I said that at the time of repentance, the sinner must make an honest commitment not to break that commandment again. Have I ever failed in that regard? Of course; we all have. The point is whether or not the attempt is sincere. The fact that Christ’s grace is endless is the only thing that will ever make that balance scale come out even. Flaunting the atonement process is to mock God.