The gate agents have been thrown into a new system thats a bit odd for them and they're frustrated (On the UAL side).
They've got Suzie-Jane Evil B. and William-Robert Testi-squeeze (typical American entitled passengers) yelling at them all day and probably are reaching USPS anger levels.
Things will calm down in a couple weeks or so.
Just make sure you smile and show up early....grab em Starbucks if you catch someone who's clearly having a bad day.
Always remember.... "Hook a brotha up"