Back button on Confirmation Page

I use the jdform plugin in an article to display the donation form. This all works OK except that when you go to the confirmation page and have to click back to correct any data then you don't get taken back to the previous page (the article with the plugin) you get redirected to the standard JD form page that only displays the donation form and not any of the article text.

I have a similar problem with the jdform plugin. When I click the "Back" button on the confirmation page, I am directed to an error message page:

"
500 - Layout "blog" not found
"

Regards
Jlaner