After Commander Chandler has taken control of the power plant intake area, just prior to him shutting off the conveyor belt you see a clipboard being held by a gloved hand like someone is still counting inventory.
When commander Chandler is infiltrating the body disposal facility there is a closeup of a woman rolling up the conveyor belt to the incinerator. As the "corpse" rolls up to the edge the woman's hand suddenly moves to steady herself prior to tumbling over.
Alisha Granderson in season 1 is a Lieutenant Junior Grade (LTJG). The Rank insignia of a LTJG is a single sliver bar. The first time you see her she is wearing the rank insignia of Lieutenant, two silver bars. The next time you see her she is again wearing the single silver bar of a LTJG.