You must have been editing your post, since grysqrl only answered some of your questions. I'll go ahead and answer all the questions.
Each power targets a single land or a single spirit, including different lines of innates like those of Serpent Slumbering Beneath the Island or Keeper of the Forbidden Wilds, unless specifically said otherwise.
You do not have to trigger the top line of an innate before triggering lines below it.
An effect that lets you use slow powers as fast, like Lightning's special rule or card Lightning's Boon, can be used on innate powers, unless it says "power card" rather than "power".
As grysqrl said, you need two Dahan/Beasts to move a Sacred Site with Thunderspeaker/Fangs. (But one Dahan/Beasts moving could take one of the presence.)
If you're worried about missing stuff, take a look again at the rules for power use on pp. 16-17. On p. 17 are some of the rules that were most frequently missed/misunderstood in playtesting; the "One land! One turn! One use!" one covers the first point that you had misplayed.
Also bear in mind the "Whoops!" sidebar on p. 20.