I would take it as a good sign - assuming the DoD was testing the heck out of it (maybe with our CPT and EWA contractors?). That would tell me they like what they have and are trying to figure out how to best use it and stress test it to determine its full potential and also its limitations in real scenarios and conditions since specs only can tell part of the story.
As they run it through their paces, maybe some technical or manufacturing issues may come up that they need to tweak, but at the end of the day, as long as they keep moving forward, that is a good sign they like it, it works, and they will probably want more than the 2 that were initially ordered.