Since operations cease at 11pm at SJC...they wind up with a lot of planes that overnight vs flip and head out for the next flight and more planes then they have gates. Have had late night arriving flights on both Alaska and WN that will dump off at an open A gate then they move them to parking later in the evening if all the B gated are occupied.
Gets really confusing for deplaning passengers if there are not lots of GA to tell them which way to go as bags still wind up in B.
Never boarded a WN flight in A, only arrived.