Fme Addons

Problem with the Google Analytics is that it shows extra visits and page view as it add up the Google crawling bots hits as natural traffic whereas most of the other services like JetPack does not count those bots visits but yes they miss some as well.

The recent research shows that 61% of traffic is from bots. Try to measure traffic from number of sales, registration etc and compare it over different period of times to track performance.

Your profile image is captured from Gravatar. Add an image against your email at Gravatar and it will be displayed here automatically.

Make sure you are not using any supercache plugin sort of thing

The best for SEO to keep those services as pages instead of post because you have to set the page change frequency in sitemap, different for posts and different for pages. There are many other things that you wont be able to do properly by using post to publish services

Please use another browser and see if the image is properly inserted in the post.

There must be another reason, Please write your website address, I will look into the cause.

No you dont need to remove them, Google is smart enough to know that,

And for removing the pages and domain
https://support.google.com/webmasters/answer/164734?hl=en

It depends on the number of resources you gonna deploy for this job and their skills,

You need to redirect, through 301 redirection all of your 404 errors will be resolved, You will observe drop in traffic but it will be back live after a month or so.