Designing any sort of new paper pattern is always tricky. It's easy to visualize it in your mind, but the actual construction can be a challenge. I remember designing a brochure once and being so pleased with the layout. But once I printed it and folded it on brochure paper, I quickly learned that brochure paper doesn't like to fold and crease as well as regular copy paper. Kind of the same thing here - cutting the diamonds proved to be somewhat inexact :-)
Don't forget you have until 6pm MTN time tonight to enter my ACEO contest for April!