Strange query additions

I am very new to the Access world. When I set up a query to be run, I am using a several combo boxes to to enter Criteria for the query. I have the following code, enter in the criteria "Between Nz([Forms]![frmStartup]![CD_StartM],0) And Nz([Forms]![frmStartup]![CD_EndM],3000/12)" It works great until I save it and exit Access. When I come back in to the database, it has duplicated itself multiple times below the original criteria line and totally screws up my query.

I have several other criteria lines being driven by combo boxes and they are all doing the same thing.

Any help would be greatly appreciated.

Strange query additions