This seems to be another conflict between the 2 builders.
Try to replace inside the page-builder.js this line
jQuery( ".column_increase" ).live(
by this one
jQuery( ".controls .column_increase" ).live(
and this one
jQuery( ".column_decrease" ).live(
by this one
jQuery( ".controls .column_decrease" ).live(
clear the cache and try again.
-Rui