Help with optin form

Hey guys,
I know I may ask something that may not be solved but I try anyway.
I just installed a really cool plugin form that allows you to have optin forms popping up at the bottom of your page as you scroll.
The problem is that the name and email fields do not seem to appear horizontally as they should…
The developer said the following:

Antonio. It looks like all of the formatting didn’t get stripped out. Another possibility is that you have styles for your theme that cause form elements to appear on their own line.

Is there a way to fix that, maybe by adding some quick css or modifying some code (that I don’t know)? Here is the correct example of how the optin shows up on the developer’s website:

http://optincrusher.com/training/aweber-integration/#comment-573

and here is the wrong one on mine:

http://vacationrentalsecrets.com/about/

Thank you so much! I know this may not be feasable, but I would really like to use that optin and not discard it because it doesn’t fit with Enfold.

Antonio