Hello dairydetippe,
It's great to hear from you again. I hope that you've had a productive week and are looking forward to the weekend.
Creating post-dated cheques ahead of time is a good option when you want to make sure you have your bill payments in order. From what you're describing, it sounds like you'd like to give your vendor all twelve cheques right off the bat. If that's the case, creating the payments one-by-one is the way to make this happen as there isn't a bulk option for that at this time.
I recommend leaving feedback for the product development team by going to the Help menu and choosing Send Feedback Online. Doing this allows customers like you to share with us the different ways we may be able to enhance the product to save you time when it comes to your bookkeeping.
Let me know if you have more questions. I'm here to help. :)