i have a similar issue. i am looking to increase the number of columns from 5 to 7. I am running the7.2 theme but cant not for the life of me get the 7 columns to appear on the 1 line. i have even gone as far as increasing the max_input_vars values. any help?
site is https://www.billetinc.com.au and the menu in question is under products.
