Not 100% important pertaining to the Contact Form.

BUT, I forgot where I read this statistic but customers are more highly subjected to inquire more of a business, if there are some trust signals. Signals like SSL certificates, payment acceptance and yes, contact information.

Contact forms are not fully needed, but doesn't hurt if it is purely service based like SEO consulting. But you should 100% put your business address, phone number, and email on the front page, probably on the sidebar or header.

It sounds like you want to de-index them.

Go into your robots.txt and disallow Google from the category..

It will look something like this:

User-agent: googlebot or *

Disallow: /web-design-news-all/

Title tags may vary. And could be anywhere from ~50 through ~70. It is measured by pixels.

http://www.highervisibility.com/blog/title-tags-are-measured-by-pixels-not-by-characters/

Subfolder is the way to go.

The rationale is that subfolders will have links from all parts of the site including from the different language section. For subdomains your ranking might fluctuate between different languages.

Subdomains are not used very often except to differentiate a primary domains core business and purpose. If it is usually just language, a subfolder is what everyone normally uses.

Yes, blog spamming is not really a smart idea. Plus majority of blog platforms nofollow comment links.

The only way you will benefit from blog comments are if they actually help the reader and is more of a marketing tactic than SEO.

I would not be surprised if this was done by your DNS. If you use a DNS manager, they could possibly redirect certain users or IPs based on patterns of visits.

I suggest finding out more about any server configurations from the admin and seeing who they use as a DNS provider or manager.