If you relaunch a campaign is it advisable to reference the failed project?
Gut instinct is that it's best not to dwell on it. You want to accentuate the positive in a campaign.I can see how commentary might be useful if you feel you have to explain something to people who took an interest in your first campaign, but you should be able to handle that by posting an update to your pulled campaign.
What happens to a campaign that hits funding goal but then not when one or more backer don't pass credit.
That's a good question, I don't know for sure, but I would assume that you would get whatever funds have been collected. Whether or not your campaign funds depends on how much get pledged — and besides, it would be a lot of trouble and it would irritate the backers to unwind the whole thing and return everyone's payments.
More than one item/reward and shipping costs
If you have 4 different designs and you want to allow backers to select 2 of the 4, I think you can simple duplicate the same multiple choice question in your reward survey. That is, ask them twice which design they want.As for shipping, you should probably set a separate reward tier for 2 prints instead of 1. Then you can set an appropriate shipping surcharge for that reward tier.
How much should I talk about myself in the "About Me" section?
I think it's helpful to look at it from the other side of the equation. From your profile, it looks like you haven't backed any projects yet. Have you tried window-shopping on Kickstarter and thinking about what you would want to know about a creator before you backed them?In a former life, I had a store on eBay, but I bought a lot before I seriously considered selling. I found that my experience as a buyer helped me a lot in writing item descriptions. I just remembered all the stuff that I wanted to know before I would buy from someone else.
Some companies start on the first days with more then 300 backers, is this a real time arrangement btw. both?
What's most likely happening is that the company had fans and friends waiting for launch weeks or even months before it actually launched. Then it announced on their social media and email list to direct their audience to their campaign.