You certainly didn't have to change your name. I am known as Denise D at a couple of other websites. Did or can you see the little icons in these comment boxes? Like I said, I couldn't see it on the photo contest page. I would LOVE to see what photo you are going to put into the contest. Hopefully, it is just a small glitch that they can easily fix soon! :)
I'm not sure now. Like in this comment box, there are small icons at the top that I'm not seeing on the photo contest page now. There is the little picture icon that you click on then find the photo that you want, you don't have to shrink it or resize it. It should post correctly in the blog.