As regular San Diego travelers know, the Southwest gates have long been split between two security areas, gates 1, 1A and 2 in a small concourse separate from gates 3-10. On Sunday 11/19 and Monday 11/20, they were also using gate 11 in the Alaska/Frontier concourse for several domestic flights.. I don't know if this a long-term expansion, or management of the holiday peak load. On Sunday, there were numerous passengers showing-up at the gate 10 podium puzzled there was no gate 11 to be found.