RE: Welcoming Contest Round #2 - The Missing Links[$50 in Prizes]

Let me see if I can answer some of your questions!

I believe that Steemit will only save one draft for you at a time. I am sure that there is a way to set posts to automatically post, but a lot of those types of posts end up looking spammy. It is better if you just manually post. As far as saving multiple drafts, you can use any word program or app on your computer or phone to save as many word documents as you want. When you are ready to post them to Steemit, just copy it from you word program and paste it into Steemit, hit post and BAM!
Fairly sure that there is no way to "undo" a resteem. Steemit asks you to verify that you want to "Resteem" a post before it posts it on your blog, so you have to hit the resteem button and a confirmation button to resteem. Because of the verification "are you sure you want to Resteem this post" it should make it pretty difficult to "accidentally" resteem. The only real option is to be careful and don't hit confirm if you don't want to resteem. Remember, once it's on the blockchain, it's permanent.
Again, once you post something on the blockchain, it is permanent. I think that you can go into a post and hit a "delete" button for a very short window of time right after posting, but beyond that, the only option is to "edit" a post to remove what it was that you want to delete. But again, there is always a way to find it. I know that once it is posted, it will be there for as long as the internet still exists, so if you don't want something to be seen at a later date, think long and hard before including it in a submission to a Steemit post. What happens on Steemit STAYS ON STEEMIT FOREVER!
I do not believe that you can "embed" html from another sight. You have to actually type in the codes to do things like type italicized, bold, or bold and italicized. You can check the Markdown Styling Guide here, or you can check out this post by @ethandsmith where he breaks down the guide in a more easy way to read and directly applies to Steemit. Polish Your Posts by @ethandsmith
It depends entirely on which bots you are referring to. Some bots like Moonbot and Qurator are groups that you have to join and members of their groups get upvotes on their posts, and some of the bots are paid upvote bots that you send SBD or Steem and they upvote your post based on how much you send. If you would care to elaborate as to which bots you are specifically referring to, I would be happy to further answer your question!