Robert_Charlton - 10:30 pm on Jun 22, 2013 (gmt 0)
berrysharpie - Congratulations that you've seen some positive movement. I don't know whether you should be celebrating, though, as 8 months is a long time. What has happened to non-search traffic during this time?
To get the history on this, and also to kick this thread up... I assume you're talking about the site changes you discussed in this thread, which were intended to reverse a prior set of major changes that you describe...
The problem with subdomain 5 is seemingly rather obvious then. It's the combination of moving domain and changing the page URLs at the same time (this often doesn't go well) as well as not having full coverage with the redirects.
I don't know how you should proceed (move or not move), but having moved a page from URL A to URL B, if you now move again you will have double the work to do. The existing A=>B redirect will need to be altered A=>C and a completely new B=>C redirect will need to be created.
You absolutely must not create an A=>B=>C redirection chain.
I hope you kept very careful records of both sets of major changes. I wouldn't make any changes now... that would be a disaster, IMO... but you might want to start reexamining your redirects very carefully, to make sure you've taken care of separately redirecting the inbound links that may have existed at each stage. Check onpage nav code to make sure sure that's current and correct.
Had you checked old backlinks (via a backlink checker with fresh data} to make sure your most important good links were properly redirected? And had you gotten any of your old inbounds changed? Also, have you acquired any new inbounds?
The latter two, in my experience, if the links are good, will confirm trust signals for Google and sometimes speed things up. The problem is that we've been through a volatile period in how Google has been looking at links, so your various stages of inbounds may be involved in re-evaluation as Google also figures out how to untie two sets of pretzels.