Workshop exhibits and buldings

Hello again, so im asking for your help again and this time its with steam workshop stuff, I gotten a few cool stuff and im running into a problem, so I got this kamodo dragon exhibit and I was having troubles placing it and it kept giving me error so I placed it in an empty spot to see how it looks, and well......it wasn't even at ground level it was a big ass mountain with the exhibit on top and I was very confused by this and the buldings I gotten its very similar they are not being placed at ground level and are floating a few feet above ground and if I place them at ground level the floors are covered by the ground....I checked my settings and things look normal but I just honestly dont know what to do