Didn't notice the reference to the back seam! My daughter's dance friends commented on this the first day she wore them. She really loves her. She is very skinny and I think she likes that they fit her so well. They also seem to be very durable. That's the key to the success of these pieces, which wear them for hours, several days a week - washed and worn many times, and a few months later - they're holding up beautifully!