Unwanted levels in OBD U8 file

Hi all, 

Does anybody know where these levels are coming from? Every time I open a file in OBD U8 they get copied into it, not just on our customised project workspace, but also opening OBD out of the box.

I've scoured the Part and Family system and they're not there. They are not library levels, and I can't find them in any of the DGNLIBs we use.

They seem to be related to ProStructures.

Any help would be appreciated, as they are risking our files failing our client's CADQA.

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