Why can't I editar my poll?

I've tried to add imágenes to a encuesta I'd previously made too, and couldn't. My guess is that tu can't alter the encuesta in any way, to prevent people from changing a encuesta which isn't going their way. It's a bit silly really. I could understand not changing the pregunta o the answer option for that reasoning, but altering imágenes won't change the encuesta results in any way.

just restart your computer and try again it always works with me
hopefully this helps...

How long hace did tu post the poll? If tu did it a few hours ago, then it's stuck like it is. If tu just recently made it then it's a glitch (and a very common glitch from what I've experienced. Happens to me all the time).