Mitt Romney can be referred to as a flip-flopper because there are very few issues where you cannot find him taking both sides at some point. Literally every single issue, he simply tells the crowd what they want to hear. He is one of the worst in political history. Rand is NOTHING like him. It is not even REMOTELY comparable.
I really don't know what the issue is with the sanctions, but your perspective is completely out of whack. Taking absolute positions like you've done, and closing your mind, is just not productive. Let's just wait and see what Rand does, we simply don't have all the information at this juncture.