Added 8 sites fine, but now won't add any new ones

I set up an account last night, added my first 8 sites and it all went perfectly.

This morning, no matter which site I try to add (I have about 3-5 more sites to add), it never adds it to my account. Initially, I get the "adding new website" announcement at the top (with the correct site/url info below it). Then, when I eventually refresh the page, the announcement disappears, but the new site is not there.

The first one or two I tried today gave me an error code at the bottom of the dashboard (think one was 200 and the other was 503). I had gotten the 200 code yesterday for a couple sites, but that seemed to clear out on its own after a couple minutes (I figured I was just overanxious and refreshed too early before it fully synched). Today, the errors just disappeared (along with the sites). I do know why the one site is giving a 503 (site is in maintenance mode for dev purposes), so I'm not so worried about that (had planned on trying the basic authentication work-around for that), but thought I'd mention it in case that's somehow causing issues. The other site (that got the 200 error before disappearing) is a fully live, public site.

I've disabled, uninstalled and removed the directory in the modules folder for one of the sites as a test (the one with the 200 error code that is a live, public site) and then I reinstalled, re-enabled and clicked to add the site. Got the "adding new website" dialog again and the same thing happened -- it just disappeared. I even logged out and back in to drupalstatus.org to see if there was any difference and so far, same result.

Any thoughts on what I can try to get this to work for the remainder of the sites? I can't think of anything that I've done differently. Oh, I wasn't initially logged in to the drupalstatus.org site this morning, but when I logged in after clicking to add the site via the settings in the module in Drupal, I got the "adding new website" notice.

Thanks! I'm loving the ease of it overall (regardless of this bug) and so glad I found it (I'd been contemplating some other options that would have been a big hassle in comparison to this).