There is a bug. It's confused by the usage of the same implants in multiple hangars. If you don't use the implant at all (or IIRC in only one hangar), then it should show the right number. I'd raised this earlier but it's not been fixed yet.
i dont care about figuring it out, it's not my problem, and im not going to go to Discord and submit it anywhere. The fact that bugs reports are there and it's convenient to you does not mean that it's convenient to me. It tells me only one thing, they don't want to hear us.