Okay, I'm going to assume that you are looking at the technology report and not the design tab. Go to the design page where you first obsoleted engineering bays(not the tech view). click the show obsolete checkbox. it should look something like the attached image. are engineering bays visible there? if they are click on them, and click obsolete again. If they are not then something is seriously wrong with your particular version of aurora and you should reinstall it.