URL Variable Passing

With my site, I have created a report generator page, that allows the user to select several canned reports and then chose the sort order, whether it is an editable table or an exported cvs file. The only issue I have is that when I pass the fields to be sorted by, the browser converts the “,” to %2C and the plugin does not recognize that has a field separator.

Is this something that can be fixed?

https://wordpress.org/plugins/contact-form-7-to-database-extension/