Hmmm…it could be you need to increase it by too much and it’s changing the shape. You might want to try the pivot plus slide for increasing the bustline by 4″ or more, shown in our tutorial Increasing the Sleeve Width. I know that sounds confusing as you’re not worried about the sleeve but I lumped those together since increasing the bustline by a lot does alter the armhole so you might want to take a watch at the second half of this tutorial. Since you’re altering all aspects of this pattern, you might want to consider doing pattern grading which basically increases the overall size of a pattern instead of doing all the aspects individually. We don’t have a tutorial on this yet, but you can find a pretty good article on it here: http://www.threadsmagazine.com/item/37396/pattern-grading-basics Super cute top! Please post a pic when you finish it 🙂