I created a new account a couple of days ago to see how the campaign plays these days for a newbie. Just played Highway Robbery and got 3 commons + 1 uncommon in the final chest. The third item is a common Battered Shield. I thought all final chests were 2 uncommons?
Every final chest except the level 1 ones and the first time you beat Highway Robbery. Because this was your first time beating the level, one of those uncommons was replaced by the first time loot Imp-proof Robes, which as a common (only guaranteed loot that's not rare or better) was sorted into the first chest slot. Just out of curiosity, has anyone gotten a common club reward in this situation? It's normally uncommon or better, but first time loot will raise it to match (always legendary the first time you beat Melvelous). I just don't know if first time loot can lower it also (it shouldn't since you're still guaranteed an uncommon in this chest).
Interesting - perhaps @Scarponi could add it to the FAQ Loot entry as well as mentioning the two 5-item adventures?
