Regarding Position 11, I agree with the reason Naz and Fabrice give regarding the difficulty of making the 5 point later, and also with Steve's dislike of the gappiness resulting from making the 4 point now. We can see whether this reasoning holds water by changing the position so that we can make the 5 point right now, though not with the checkers we wanted (from the 6 point). We then avoid the gappiness, and of course solve the problem of how to make it later >>
I altered the position by switching the number of Green checkers on the 22 and 21 points, and making the roll 33 instead of 44. Snowie 4's 3-ply evaluation then prefers making the 22 and 5 points over the 22 and 10 by .094, showing that these reasons probably are the right ones. (And, as is often but not always the case, that "the 5 point is the 5 point.")