All you can do as the OP is point out your own mistake (via editing your question), downvote wrong answers (if you want...but if they are only wrong because you were unclear you may want to skip this step for ethical reasons), and then leave a comment informing the answerer to the new information. Beyond that, let time, the community, and the natural elements of Stack Overflow take their course.
I don't think the weight of downvotes from the OP should be increased. Besides, the OP is usually one of the least-qualified participants in questions, so their votes shouldn't be worth more than others. It's generous that they even get to vote to begin with since they are the self-professed confused party.