One problem solved, another created

Much like myself, our house is old and wonky. So much so that the drawer on my Billy bookcase refuses to stay closed because the floorboards gently slope downwards. A nightmare aesthetically, a disaster when you have a pair of furry terrorists who will take any and all opportunities to get to cat Narnia. This is how the drawer usually looks, if I don't wedge something in front of it but as it's at…