Exactly what I though, I spent a while searching for the door before I gave up. On ascent I had a spare MM so when I reached the floor I decided I might as well see for sure
Not that you asked, but my favorite strategy with the Huntress is to turn a Scroll of Upgrade into a Scroll of Enchantment and enhant the bow as soon as possible. Getting a good enchant (Elastic and Grim are my favorites, though lots of people like Projecting) early can make a run easy.
I do mainly ranged combat. I have a decent melee weapon if an enemy gets too close, so I worry less about the armour. Too, I'm about to get a STR potion and will then be okay with the armour. I'm dumping UPGRADES into my ring of Sharpshooting as that raises the LEVEL of the bow. It is tactics. I'll worry about armour once I have plate. It is a very good run, especially for a challenge run.