Is that the final answer????? Geez. That's one thing I am not feeling about some on-line entities; lack of control. I was hoping the owner/mods would step in and answer the ? here.
On the blog in question on the top right there is a box to click. Look for a blank box on the original post in the blog and click it. On the bottom left I believe the option was Modifications or something like that which leads to a drop down box that lets you delete. Just look on the bottom of the OP blog post and the option to delete amongst other things should be there. It worked for me.