Hello, Dina.
Please, carefully look in the lesson in what form the cutting details should be. On the front detail, it is necessary to completely mark the waist line with a basting (the line for sewing on the skirt in front). There was no need to cut out the detail of the panties on the back. It is necessary to remove the outline of the bottom line of the island and make a large allowance (about 6 cm) below the top line of the island.