You can delete your extra post - the one with no responses yet. At the bottom right of your post, you'll see the options - Edit, Delete, Reply, etc.
Since it's a duplicate, people will be cool with deletion. But, a word of warning (since I see you're pretty new), deleting a non-duplicate post with responses is considered very taboo on these boards.
Re: sorry for posting same thing twice
You can delete your extra post - the one with no responses yet. At the bottom right of your post, you'll see the options - Edit, Delete, Reply, etc.
Since it's a duplicate, people will be cool with deletion. But, a word of warning (since I see you're pretty new), deleting a non-duplicate post with responses is considered very taboo on these boards.
Good luck!