I'm pretty sure that the LCCN's don't come out in the right order. Eg., from my library, they are arranged the following way:
BV170 .A42
BV170 .A419
They should come out in the opposite order, because the numbers following the A are decimals, not whole numbers. In that case, .42 comes after .419.
Check this link for reference:
http://www.library.cornell.edu/olinuris/ref/info5b.htm
If this belongs under support because the problem is on my end, my apologies. Otherwise, this would make a good feature update.
Preston