Hi,
thanks for your post, and sorry for the trouble.
Responsiveness in tables is in general tricky, as there is not clear behavior of what a table should do on a small screen (and actually what a table can do technically in HTML/browsers).
One approach that is common is to flip the table to the side and make it scrollable. This is possible with this TablePress Extension for example: http://tablepress.org/extensions/responsive-tables/
Regards,
Tobias