I tried to replicate it but it seems to be working. Make sure you didn't enter the text in HTML editing mode?
If the shortcode looks right when you are editing in raw mode, then is there a page you can provide a link to? Id like to look at it.
Haven't worked on the button thing yet, but I was waiting for an iframe test. The guy isn't getting back to me so Ill have to go without that feature. I did research it to make sure I could do it easily enough though