Problem with ajax-loader.gif

The plugin in the (0.2) works great just one problem as the version I downloaded didn’t have any ajax-loader.gif in the zip pack.
Also after place one in the main directory, I found that the same ajax-loader.gif is the whole time appearing since you load the page – after you send or get any message of error, looks like it has the regular behaving… something keep being forgot?

https://wordpress.org/plugins/thinkit-wp-contact-form/