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Ok the thing is, if text is humanly readable, you are safe. Just because you are using white texts and then something goes wrong with the style and the texts go invisible for a few days will not necessarily get your website banned. However, here I am assuming that you are not stuffing keywords there

Ok got you. They have definitely messed up with the canonical thing. But Google is definitely not going to follow this wrong instruction. Canonical tag is just a signal and if you are setting it incorrectly, Google will not follow that. So, that means all the pages of that directory will get indexed and you will get value for your website. Hope that helps.

Of course not.  But here I am assuming that you are not copy-pasting the same information in two sites.

complex thing. Not sure if this may help you or not -

Example meta tag

Add the following meta tag in the HTML source of your page:

<meta http-equiv="expires" content="mon, 27 sep 2010 14:30:00 GMT">

Well the quality of the links is pathetic and I would not surprise if your website get penalized by Google for unnatural link building. Tell me one thing, don't your existing SEO company send you monthly report of what they are doing? What I fear is that they are building links with exact matched anchor texts and this is under Google's radar for quite sometime.

If not, you should ask them to send all the details immediately. You need to get all these links down.

Check your webmaster tools account and let us know if you get any message there. Also let us know when the ranking drop.

If the blog posts are accessible otherwise, you can go ahead and place the following meta tag in all the tags and archive pages –

It appears that your website has got penalized by Google Penguin update [link penalty]
http://www.seroundtable.com/google-penguin-3-15802.html

But as Google Search quality team has already made it clear that there is no manual action taken on your website, I can safely assume that your website has got penalized by algo shuffle.

_So, there is no point in sending reconsideration request to Google. Try to get all the unnatural and spammy links removed. Send link removal request to those crappy websites. If you have log in access of those sites, you can do that as well. If you have removed most of them, you then can use Google Webmaster Tools Disavow Link option.  _

_And about reliable seo company. Whoever is saying that you can top ranking in two months or so for $100, is trying to fleece you. _