Detailed object not blending properly. Help

I hope I've inserted this image correctly. I'm a complete newbie so I hope I'm posting correctly. As you can see my image is not blending correctly. I made it from scratch on illustrator- creating the little pink shape and then putting it into a radial. Then I copied the image and erased either side of each, creating two halfs. I put the two halfs together, cropped the image into a perfect circle and then added all the horizontal pink bits all around the edges. I've grouped it all together. I've tried expanding it. But when I go to blend the image, it looks like part of the cropping I did when I was making it has come undone. Any guidance would be greatly appreciated. Thank you.