Chai - ha! Thought you would find my tomb challenging. Glad you liked it.
As for the limited blueprints, we'll try to get them in the store in next week's build. Until then, I recommend just hanging onto your loot until you can expand your tomb a little. You can also delete loot in your backpack by dragging it onto the delete button that appears on the left (if you want to clean up your loot stash a little). It's not a bug, it's a condition that should encourage you to put the treasure you have out in your tomb and not hang onto it forever.