Hello everyone,

I am flying ATL-MSY tomorrow and am browsing seatmaps at DL.com. If I were to purchase a fare right now, DL.com is selling H class fares in coach, yet the seatmaps for these flights show that the flight is completely full. However, seatcounter.com shows lots (6 or more) of availibility in Y.

How does that work? Who's data is more accurate? Is this evidence of overselling? Confused.