As with most plugins, The plugin will follow the css of the location the line of code is placed into so try to locate it in a div, wrapper or similar.
Example would be if placed into a sidebar then it would have the width, background, etc of that css style.
Move the line of code up or down one line at a time until you see a change.
Sort of the best I can tell you without having more information.
Post your website url. Look over a site that is using it with your browser f-12 tools. The problem is more where your placing the code.
Example - in the main.php/Bcute theme located at
www.kathyfarnsworth.com is the plugin line of code.
<div class="containerbg">
<div class="container">
<?php content(7) ?>
<?php osc_current_web_theme_path('header.php') ; ?>
The above plugin code line is picking up the styling from <dic class="container">
There is a world map plugin. I have not used it.
Tom