Okay, so under "Evaluation and Selections" on the website it says this:
"An evaluation panel in each discipline reviews all complete and eligible applications. Each application is evaluated by a panel whose expertise is in the science or engineering discipline of the applicant's proposed doctoral degree program.
The evaluation of applicants is based on review of their entire online application, including academic records, personal statements, recommendations, and GRE scores. The top applications that are ranked by the evaluation panel are then forwarded on to the Department of Defense.
The DoD then selects applicants to receive NDSEG Fellowships based on an assessment of the applicants’ academic ability in fields of interest to the DoD. Selection of awardees is made by the Army Research Office, Office of Naval Research, Air Force Office of Scientific Research, and the High Performance Computing Modernization Program. Each agency directly monitors the awards conferred to fellows in discipline areas closely related to its mission"
Perhaps this means that people who were sent "still being considered" emails made it past the evaluation panel and are currently in the process of being considered by the DoD.