Sort by color first then value within each color. It is just as important to have color flow as it is to have value flow.
My avatar is an example of a monotone bargello - I only had to sort for value. YOURS is primarily a color flow - don't lose it.
Blues - move the 2nd from left to the 3rd from right position.
Greens - not too sure about the color value of the two on the far left - they seem to be blueish green and will be out of place color-wise if moved to proper position value-wise. Do you have other greens you can work with?
Orange/Yellow - the 2nd & 3rd from left are very close in color and value. You might want to replace one of them with a lighter or darker value. Unless of course YOU see more difference to them than the photo shows.
Looking at it again ... is the blue 2nd from left the same fabric as the green 2nd from left??
Still looking ..... :)
The "green" on the far left can be moved to the blues. But the 2nd green still looks out of place to me.