similarities

Good afternoon. I apologise for the inconvenience. I'm new to the shop and don't have many drawings yet. Thank you for allowing us to be creative. I have a quick question. I've been getting a lot of rejections for similar work lately. But after looking through my portfolio, I haven't found any similar drawings to the ones I was rejected for. I would like you to help me and tell me how I can avoid such mistakes in the future. Thank you in advance for your reply.