the island could also be NZ or Japan, as both could Easily be wiped off by a tsunami (artificially caused of course)
Also, the 7 hills may also refer to Antarctica, as there is a region there that is referred to in the book of no Enoch (iirc) that has 7 hills, most of which contain various precious minerals and gems.
Other than those 2, i think most of the others are correct. For the Others i dont know/believe, i think there is a different explanation we have yet to figure out for those.
Not sure on Bolt, Idol, Belly, 2 voices, and Ravens. The others i think are spot on.