So I just bought a new nautilus 2S. I looked at YouTube videos beforehand and I saw that it has a leak proof system. But when I unscrewed the bottom to make sure that I have the right coil pre-installed, the entire bottom came out, similar to the nautilus 2. Is all versions of the Nautilus 2S with this locking system or some don't have it? I tried hard to unscrew the very bottom but instead it came out like the 2 so I took off the glass and changed the coil, put the glass back, filled from the top and started vaping. Did I do something wrong?