I understand your situation better now but not sure of the purpose, using the Text area input for placing an Order. Perhaps you'd have better results checking out the ZC core coding used in the Checkout.

Specifically:
Page 1 - Checkout :: Shipping Method
Page 3 - Checkout :: Confirmation

Page 3 uses exactly what was inputted on Page 1 Text area, for "Special Instructions or Order Comments", but is correctly formatted.

Note: I did not test the Checkout on your site. Results above are from another site using v1.3.6