Once you've have selected a winner, you can always re-select another by by click on "Re-Draw"
Once you've signed in via twitter, submit the link/URL of the Tweet and enter the amount of winners you need to select and finally click on "Draw Winner"
All you need is the "Draw Identifier" of the tweet to confirm the legitimacy of the contest. If you have that, type or copy and paste it into "DRAW VERIFY" and click on "Verify"
Once you've made the payment, you need to email us your Twitter username to retweetpick@gmail.com in order to get your account activated.