They're doing maintenance on the canal. It normally takes 8 to 10 hours to pass through, but now they are limiting the number of vessels each day. That website seems to say the Pleiades Leader will "transit" on the 16th in the AM.
The Port Hueneme schedule hasn't been updated since the 10th. Maybe they already factored in the delay.
As of today (6/15), the ship is scheduled to be in San Diego on the 22nd.
http://www.sdmis.org/schedule/