Modification of the site on the modx platform

Our site on the modx platform http://www.stromizmeritel.ru/. It is necessary to expand the functionality of the table http://www.stromizmeritel.ru/oborudovanie/dozirovochnyie-kompleksyi/universalnie-dozirovochnie-komplexci: to make it possible to change the number of columns in the control panel, edit all rows, add tables. Right now, in the admin panel, we can only add and modify lines, all but the 1st.
This page http://brain-technology.ru/resheniya-pod-klyuch/texnologiya-proizvodstva-stekolnoj-shixtyi-i-mnogokomponentnyix-smesej need to be formatted by design in the attached file.