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Hello, We are a healthcare company with a strong domain authority and several thousand pages of service related content at brand.com. We've been operating an ancillary ecommerce store that sells related 3rd party products at brand.com/shop for a little over a year. We recently  invested in a platform upgrade and moved our site to a new domain, brandshop.com. We implemented page-level 301 redirects including all category pages, product detail pages, canonical and non-canonical URLs, etc.. which the understanding that there would not be any loss in page rank. What we're seeing over the last 2 months is an initial dive in organic traffic, followed by a ramp-up period of if impressions (but not position) in the following weeks, another drop and we've steady at this low for the last 2 weeks. Another area that might have hurt us, the 301 redirects were implemented correctly immediately post launch (on a wednesday), but it was discovered on the following Monday that our .htaccess file had reverted to an old version without the redirect rules. For 3-4 days, all traffic was being redirected from brand.com/shop/url to brandshop.com/badurl. Can we expect to recover our organic traffic giving the launch screw up with the .htaccess file, or is it more of an issue with us separating from the brand.com domain? Thanks,
Eugene