I originally believed that to be a bug too. However, that isn't actually the case. The manufacturing cost reductions are for two different kinds of improvements: one for manufacturing improvements and the other for research improvements. I had to look into the game-files to find that out. The problem is, that both bonuses use the same icon and name. They're not the only bonuses with that problem though. The bonuses to weapons-range and defence for ships and starbases have it too.

As for posting screenshots, you have to upload them to a file-hosting site first. Then you can link to them in your post.