I think this might be a flaw in the pattern - the designer accidentally mirrored it. If you look at the examples made by other people on the Craftsy page, they are "backwards" just like yours. The designer herself doesn't show any pictures of a completed block, just mock-ups in EQ. Since she hasn't sewn it, she didn't catch the problem.
Have you tried using a pattern by a different designer? If you do and it works correctly, then we will know that the problem is with the current pattern, not something you're doing wrong.