Unfortunately, the sentence that addresses eligibility for unsuccessful moose, sheep, goat, applicants was deleted from the 2008 regulations book when is was reformatted/rewritten in an attempt to make it more user friendly. The wording from the 2007 regulations is correct: "Unsuccessful applicants for bighorn sheep, moose, or mountian goat controlled hunts ARE eligible to participate in 'leftover' and unclaimed controlled hunt drawing or first-come, first-served sales..." It's already on the list of changes for next year's book.
To address the question of applying for another tag for the same species already drawn, page 70, column 2, para 2 seems fairly clear. "Any person who's name is drawn in a controlled hunt for deer or elk is prohibited from hunting in any other hunt for the same species...except...controlled extra tag or depredation hunt." This assumes that the person actually purchased the permit/tag - the actual code wording is "any person who receives a permit" and you need to purchase to receive it.
So, you can apply for species for which you don't already possess a permit. And if your name was drawn is the first drawing, but you didn't purchase the permit, you can reapply for that species in the second drawing.
Hope that helps clarify and sorry for the omission in the regs book.
Tom Keegan
IDFG Salmon Region Wildlife Manager