Although I have made several blocks using this pattern, I still am having difficulty on measurement. After stitching the strips together I measure it to get the inches for squaring it. The measurement fluctuates between 10-10 1/4". This shouldn't be driving me nuts, but it is. A 1/4" is a big deal in quilting. I can change the size lengthwise but not the width. The width is what changes. Has anyone else had this problem?