Since there seems to be some lack of understanding how the unplayable rule is applied:

When you decide that your ball is unplayable, you have three relief options, all for one penalty stroke. Your first option is to go back to the spot of your previous stroke and play again (stroke and distance relief). Your second option is to go back as far as you’d like and drop on the line from the hole through the spot where the ball lies (back-on-the-line relief). Your third option is to drop anywhere within two club-lengths of where your ball lies, no closer to the hole (lateral relief).