Glad you were able to repair it easily. I've had problems when I make hst by sewing and cutting apart. I usually catch the ones that don't have enough seem before I put then into a project.
In the beginning of my quilting career, I had that happen alot because I wasn't very good with my 1/4" seem. Fortunately all my quilts went to family members who had no problems bringing it back to me for repairs. I'm much better now.