This means that it isn't yet a trust anchor...... but managed-keys *does* contain both keys (20326 and 19036).
...but will be at some point, which you can determine by looking at the
KEYDATA line in managed-keys.bind. The second date field is the when the
add hold-down period will end, in UTC. (My server has 20170811222637,
about five hours from now.)
More recent versions of BIND added comments to the file that say "trust
pending" with a more human-readable date, and the 'rndc managed-keys'
command so you can query the server directly.