What I can tell, is Deepwood <-> Soot Black <-> Loam Brown, so you may be overfeeding due to left over RGB values as others have suggested earlier with this "range" effect. If this is true, we are in a new area that no one has done any testing with. You may want to fall back to the old one feather proc method, following the feed order below, and stop at 1st proc, wait 6 hrs, then con't with the feeding at where you left off to next proc, keep doing this until you hit soot black. Hope this will get you back on track.
Loam Brown -> Soot Black -> Deepwood
Code:
Step Feed Qty 63 55 47
1l apple 1 68 50 42
2l pear 1 63 55 37
3l berry 1 58 50 42
4k apple 1 63 45 37
5k pear 1 58 50 32
6s berry 1 53 45 37
7s pear 1 48 50 32
8s berry 1 43 45 37
9d pear 1 38 50 32
10d berry 1 33 45 37
Target Colour RGB 31 47 39
To Target -2 2 2
Current Guess Deepwood Green
L = Loam Brown, K = Kobold Brown, S = Soot Black, D = Deepwood