Is Steam trying to pull a fast one?
All of the items included in the Can't Stop Laughing Bundle are currently on sale on Steam, but the bundle itself isn't on sale.
The bundle states that BattleBlock Theater is on sale for $7.49, and Castle Crashers is on sale for $3.74 -- but the bundle itself costs $24.99.
Meanwhile, Steam discounted their other Indie bundles; for example, the Heroes Rise Bundle is on sale for 20 percent off, the Don't Starve + Reign of Giants DLC bundle is on sale for 60 percent off, and the Amnesia Collection is on sale for 80 percent off.
Update (June 23, 2014): Four days later Steam finally realized that it's stupid to put a bundles contents on sale, and not discount the bundle itself. You can now pickup that bundle for $6.24 (75 percent off).