MAY 1st TRAFFIC LOSS DUE TO PERCEIVED LINK SPAM CAUSED BY NORMAL SITEWIDE LINKING BETWEEN ROOT DOMAIN AND SUBDOMAIN (maybe:)
I run my commerce site in shop.domain.com I have various articles, content pages, and stuff on my root, maybe 300 pages. These pages link back to my home page and some other run of site pages, and categories in my shop.
Then I have pages like:
Which have the same kind of run of site links.
SINCE THE PENGUIN CAME TO TOWN
I have noticed a drop on May 1st 2012 So i checked WMT and can see that I have an extreme amount of backlinks to my shop.domain.com - LIKE AROUND 6'000'000 - It seems that the links dont even have to me
My MOST linked to page is teh world pay call back page - that I dont actually link to from anywhere other than the shop.domain.com - SO THIS SHOULD BE AN INTERNAL LINK.
BUT - in WMT is is being classed as a BACKLINK that somehow - uses what they call intermediate link. So a link from shop.domain.com to the worldpay call back is being classed as a BACKLINK from support.domain.com even though support.domain.com doent link to the WorldPay Call back page. HOW WEIRD IS THAT? Whatever is made my backlinks explode to unatural levels.
I guess this isnt good. IN reality these are internal links accorss my subdomains which in my mind is really one domain
HOW CAN I TELL GOOGLE TO TREAT ALL MY SUBS AS A SINGLE SITE
A bit like we use rel="canonical" for pages, I need one for subs domains.
Is that possible? Will it be BEST practise? Is is normal to have such large amounts of back links. My commerce site has around 70'000 product pages.
sorry i didnt spell check this.
IF ANYONE CAN ADVISE ME RE BEST PRACTISE ON THIS I WOULD BE VERY WELCOME - WMT WTF