I've gone over this in quite some depth with the WIAA rules interpreter and finally understand it. He agrees, the wording is not the best.

Once again, if the runner achieves the base he was attempting to acquire, then the obstruction is ignored. If the obstruction is ignored, then there is not a one base minimum to award. It all centers around your judgment as to what base he was attempting to achieve and then whether or not he achieved that base safely. In the OP, he was not trying to achieve 2B, so by default he was trying to achieve 1B and did so safely. Therefore, the obstruction is "ignored" and not minimum one base award.

Have a great day!
Leo