In case you’re working with Visual Composer you have to be careful adding columns to the rows.
If you add custom structure of the columns, they may behave strangely and ruin your structure.
So, the incorrect variant of dividing row into columns is to add this kind of custom row layouts: 3/12, 6/12, 4/12, 2/6, etc.
Simplify the fractures the more you can, so that they look like 1/2, 2/3, 1/3, 1/4, 5/12, 7/12, etc.
Or you may use the span structure to set the size of columns: span3, span6, span4, span8, etc. You may add any number from 1 to 12 using this kind of structure.
DFD Support Team