yes and no. the way Kickstarter runs is that yes, you can only pick one pledge. BUT if you get that urge to add more, then it is easy to do so. you can simply add to your pledge. for example: you have pledged $50 for a reward you really wanted. now you see that Dan has released an awesome new cover in the stretch goals and you really want that too. well just add to your pledge the amount of that stretch goal and when you are done, kindly send Dan and friends a message of what you added. it helps you to keep track of your purchases so at the end of the kickstarter, when you fill out the survey, you will remember what you ordered.