Adding a custom product description line to offer


When I create an offer, there is the product description, with the standard description, from the product. I added a line or a comment to the end of the description (Pic. 1), but when i print this offer, only the standard description is printed (Pic. 2), without my comment / extra line.

So, i want to print the actual description for this actual offer, but as preset the product description should be also there…

Thank you for your Help!

PS: Do not wonder about the empty Cells, i deleted them, for safety reasons.

Hey can anyone help me with this problem?