JSON API Plug-in – Strange Results

Ok, so I will admit, this is the first time I’ve used this plug-in, so this maybe an ignorant question. I think I am getting unusual results from the plugin. Whenever I format the url the “content” is empty with the actual content appearing outside the the second quotes, so it looks like the following:

"content":"" <div class...</div>
instead of
"content":"<div class...</div>"

The second issue is it keeps adding forward slashes (\) in seemingly random locations, so I am getting results that look like this:
<a class="\photo_link\" href="\http:\/\/www.universalsole.com\/\" target="\_blank\"><img class="\photo\" src="\http:\/\/oldstpats.org\/marathon\/files\/2011\/05\/UniversalSoleLogoColorOnWhite-small.jpg\" alt="\Paint\">\/a>\/div>\n"},{"id":252,"content":"</a>

Obviously, these results are unusable. The URL that I have formatted is fairly basic and is as follows:

https://oldstpats.org/marathon/?json=1&post_type=marathon-sponsors&custom_fields=sponsor-image&include=content

Let me know if there is any other information I can give to help this out.

Thank you,
Anthony