The best place to start is to read Moz.com's Beginner's guide to SEO: https://moz.com/beginners-guide-to-seo then see what you can apply to your situation.
Also, remember that Google tailors it's search results to what it thinks you like to see, especially if you are logged in to your Google account when searching, so while you might be second when you search, when another person searches your page may not be second in the results.
I know two non-techies who bought Samsung Android phones when they upgraded rather than iPhones because of that trial. Not a huge effect and obviously anecdotal, but these things do have an effect.
However, I think developers are likely to stay with Apple as they have solidly adopted their products over the last 7-8 years, and weirdly many people seem willing to forgive a large company anything, just because they happen to have purchased some of their product range.
A reasonable explanation I thought of is they're having trouble keeping track of who is liking what across their databases. i.e. Alice has liked Company X, but the like turns up on Bob's account.
While this is a bit of a poor show, it would be an explanation that doesn't require any nefarious behaviour from Facebook, just some slightly dodgy code somewhere.
I'd guessed this was to get something out the door quickly. It would be useful if you linked the FAQ image as a mailto to your e-mail address, or just through to your Twitter account. Having to type those out manually is a bit annoying.
They're probably just using Google Alerts. If he tagged the image "nexus" when he put it on Picasa it'd be indexed by Google very quickly (they run Picass) and hit Alerts e-mails soon after.
I'm interested to see that developers aren't trusting Twitter when they said if you got close to your token limit you'd be able to apply to them to raise the limit.
On reflection, given their recent behaviour as a company I can understand that.
Also, remember that Google tailors it's search results to what it thinks you like to see, especially if you are logged in to your Google account when searching, so while you might be second when you search, when another person searches your page may not be second in the results.