closest match algorithm in play?

[Randall Diffenderfer]

i get multiple records from a query where i have zones that overlap.  somehow i had gotten the impression that "best match" was in play?  is that not the case?  how do i achieve a "sieve" effect here?

in a combined dataset:

rbldnsd example.com:combined:test.zone

[test.zone]

$DATASET ip4trie:test test

10.10.10.0/24 :127.0.0.24
10.10.0.0/16 :127.0.0.16

given a query "1.1.10.10.test.example.com", i'd expect to see "127.0.0.16"
given a query "1.10.10.10.test.example.com", i'd expect to see "127.0.0.24", but i get both records back.  huh?

admittedly, it does match both zones, but i really just want the more "exact" match.