MicroStation V8i I have a DGN file that shows lots of used levels that have no elements on those levels.

I have a DGN file that shows lots of used levels In the level display and the level manager that have no elements on those levels.  Why are they being reported this way and Is there a way to stop them from being reported as used?  I have attached the DGN file that is giving me the problems and an example of  2 levels that are doing this is TOPO_E_TCAN-Line and TOPO_E_TCEM-Cell although most of the levels being reported as used actually have nothing on them.  

0015000TOPO.dgn

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