Good or bad? I don't know. My honest thought is: aren't you bored with studying already? I am!
Yeah, they seem like in the same area. Something I was considering was two Master's degrees in the same area, but the other one to improve the first one and learn more than I already know after it. But two seems like plenty already! I think it is a fair point that you can learn while doing the job already. And you can self-educate too. Trust me, nobody will be concerned with what and where you studied if you will be good at your job and already have a degree. And that there are courses for professionals out there that take up less time than an actual degree and focus on specific areas of interest, without all the repetitions and things that do not interest you. Unless such a course is hidden under the degree label.