The new Harbinger series wasn't a part of the past two updates, so I tried to create an entry myself in my database. Although it would let me create Harbinger (2nd Series), it would not let me add any issues to it. So I ended up creating Harbinger (3rd Series), which I could add issue 1-B to. I'll submit it, but I didn't know if something was going on behind the scenes for 2nd vs 3rd, so wanted to bring that up.
It would not let me add any issues at first. Then I created the "3rd Series" (thinking that somehow the other Harbinger titles was being counted as the 2nd Series) and was able to add issues to it. Then I went back again, and this time I could add issues. Go figure. Must be operator error somehow, but I have no idea what I did differently the last, successful time than the first few times. :-)