Hey Patrick
Okay, tricky one as it's not really clear what the problem is here but it feels like you have created some kind of duplicate content problem when shifting all of your sites over to WPMU.
Some questions:
- What are the other sites?
- Were any of the other sites affected?
It's tough to give you a perfect answer without some further analysis but I suspect a few things here.
- You have created a duplicate site over at: <cite>smartwatch.smartfamily.wpengine.com/top-5-smart-watches-2013/</cite> (on a much more established domain)
- You have lots of internal duplication on the site
A few things you can do
- Redirect the smartwatch.smartfamily.wpengine.com site to your main site (seems you have done this)
- Tidy up the internal duplication (too many categories and tags likely)
It would be interesting to get some insight into all the 301's you have implemented here as well and really I would recommend an audit of the site just to make sure you have no underlying and not immediately obvious problems. There are a some solid tutorials on SEO audits on this very site so if you want to keep it in house at least find a structured audit process and follow it through (you will likely find other optimisations so it will be a worthwhile process).
Long before Panda and Penguin I have seen sites slapped for duplication and lose 90% of traffic. I have seen this with accidental multiple domains and due to aggressively stolen content and other seemingly innocent reasons.
Ultimately, it seems innocent and like some kind of technical gotcha so certainly, I would not give up here.
Some tasks you could perform:
- Set up a moz campaign and review any issues
- Run copyscape and check for duplicate content and resolve
- Do some manual duplicate content queries to spot other domains that may have your content due to misconfiguration in WPEngine
- Claim all domains and tidy them up in webmaster tools
- Wait
Ultimately, just tighten everything up and give it some time and everything should bounce back. Beyond that, maybe consider getting a pro to do a quick audit to check things over for you and advise on the best (quickest) course of action.
Hope that helps
Marcus
