I love to sew with silky-like fabrics, whether they’re polyester or a rayon blend. I continuously have trouble with the way garments hang. For example, I made a tunic top with raglan sleeves and here’s what it looked like: the sides hung lower than the front or back; the back swung out like I was standing in a breeze and it was also too short.(I did fit the pattern for a slightly rounded back). So, challenged, I bought the same fabric again. Now, before I cut it out, I need some really good sewing advice. Is the fabric slipping as I cut? (I thought I was being careful). Does anyone have any suggestions? It seems like it needs weight at the bottom. Help, help!