I made a log cabin for my sister's birthday last fall, and I can't tell you how many big goofs I had. When I realized I made the exact same mistake twice and about to do it three times, I quit. I was not concentrating, I was anxious about something else, I was tired of doing the same thing.
On the upside, I was thinking your "mistake" blocks would make great mug rugs. You have a set of 4 right there!
Or sew them all together for a great matching pillow for the quilt.