I have a bug, when i try to land the habitats on with tracking, it doesn't go on the ground all the way, it floats right above the ground.
Unfortunately it's not a bug, it depends on how terrain generation is done in SE 0.9.8.0. Sometimes goes also underground a bit.
And when the planet rotates, as it rotates the ship floats up a little and flops a round.
Hence my advice of stopping time once the habitat is placed as intended.
Maybe I should expand a bit the instructions.
When the habitat stops above the ground, floating, in order to make it touch the surface you have to press Shift-F2. This will open the Ship Editor window to the right. Then you can operate with position and rotation buttons until you have the habitat placed correctly.
Once you've done, hit space bar to stop time.
This is only an exercise to get the impression of "Space Engine with buildings" in 0.9.8.0 version, but they behave like ships anyway, so they unfortunately move away with time.
In the next version SE code will be better equipped to maintain structures in orbit or at ground level.
Also where did you get the ship model of the space engineer astronaut?
I answered you here:
http://forum.spaceengine.org/viewtopic.php?t=80#p9021