Flight randomly moved a day early?

Not sure if anyone has seen this one before? 1k, wife is gold, though I don't think that has anything to do with it. Wife and kids are flying home (COS) from IND by way of ORD. Flight scheduled for tomorrow at 630PM. Confirmed via email confirmation, and again via "what to expect for your trip" email 2 days ago. Got a text ~45 minutes ago saying time to check in for your flight...right at 24 hours. So far so good Go to app and it says the flight is today?! Like, in 2 hours? Reconfirm on United website and it says the same thing. Go to texts and see nothing prior to the check-in text, and same on wife's phone. Go to email and see nothing other than an email around 5 mountain today saying refund issued for Eco+ seat (but only lists my son, nobody else). Go back to app and it says no seat assignments for any of them and boarding in 30 minutes?? Still on hold with CS. Assuming/hoping it's just a glitch?