Double Column Form with a Subform

Double Column Form with a Subform

My app has a crowded form with a subform in the bottom.

When making the form double-column, the subform doesn't peacefully overflow the first column and stretches the 1st column so much that the 2nd column becomes ugly and useless.

Is there a way to add a subform to a 2 column form and keep the design tidy?