Hadn't notice that, since I usually teleport back to where I was before I went to the Den. But your original little room is at Avery's Court, so presumably they all magically take you to that same spot.
Hi! Basically you need to equip your house before you can visit it. To equip it press B to open your backpack and then click the blue arrow on the top right of the "My Inventory" interface twice; this gets you to your Housing Items. To equip your house, first select it by clicking on the icon and then click on the grasping hand icon at the bottom of the interface. You'll see a blue hand appear on the house icon, indicating that the house is now equipped. After equipping the house, your Go Home button will teleport you to your new home.