I feel like if they were trying to pull a fast one and lie to the DOT it'd be more efficient to not display delay reasons at all, like every other airline does.

Its been pretty well established their classification system displays only the most recent reason but accounts for all delay reasons and time attributed to determine controllability. And not hard to see why a flight that had 2 hours maintenance and 2.5 hours weather got called uncontrollable until it got to someone beyond the front line to look into it further.