Originally Posted by
ManiacQuilter2
The reason the blocks LOOKED wrong was because the top row shows the FULL size of the actual block and the next row having the 1/4" seam pressed on it's back, that made the row of squares look a 1/2" shorter. Just an optical illusion. Don't worry about the back. Just make sure your front is correct. Have fun quilting !! I
What she said! The seam flap is covering up part of the block and making it appear unevenly sized compared to the next block. It's fine, that's exactly how mine look too. If it really bothers you, you can press the seams open and it'll look more even, but to me that's just a huge pain and I don't do it unless the block has a spot where a bunch of seams come together. Pressing to the side like you've done here also helps seams nest together.
You're doing great!