Older app version without compatibility

I dont have iOS 8.0 on my device. So the App Store says "hey do you want to download an older version of this app?" Yes, please. And then the older version opens to say you need to upgrade, with no ability to cancel out and use that app. So, Southwest, why offer the older app for download if you dont plan on supporting it?

CornellVeggieMan about Southwest Airlines: Travel App, v3.3.7