S IV is not something that exsists. Its just a classification system IV GO uses. SSS was 100% i think, no idea what S was exactly but its ok. The exact IV ranges from 0% to 100%. Use Calcy IV for android or Pokegenie for IOS for a more exact IV.
1: If you ever log in to IV GO with your pokemon credentials, stop doing it. It might give you shadow bans (unable to see/catch certain pokemon) and may even lead to an entire ban of your account.
2: Solrock and Lunatone are expected to switch locations at some point in the future, just like Seviper and Zangoose did. Have a little patience, he will come to you.