Auto generated levels that won't delete

Hello,

I have several levels which automatically appear in any new .dgn file that I create. These did not appear when we used to use Descartes but since switching to Bentley Map they are in the level manager in every new file. The problem is that I cannot delete them. The levels are unused, and are apparently related to the LineStyle.dgnlib. However when I try to detach a library the message center tells me that there are no libraries to detach. Under configuration Level Library Path the folder listed does not contain any .dgnlib files. Additionally a search of my entire C drive has not located any linestyles.dgnlib file.

Does anyone know of any way that I can remove these unused layers?