I want the left column to be full. Why does the left column not come down? Any Suggestions?
The continuous section break at the end tells Word to start a single column section at that point.
This causes the columns to wrap and balance. If you type more in the first column they will both grow.
You could change the following section to the same two columns and then delete the continuous section mark.
If you want to prevent such wrapping / balancing, you would want to create the column without selecting text and have it set for from this point forward.