In your paper planner, the soft date is not an actual date. Instead, you write the task in the back, behind the correct context tab(s), near the top of the page. Tasks you want to do sooner appear at the top; tasks you want to do later appear father down the list. Someday/Maybe tasks are added to the bottom of these pages.
You may want to leave spaces when writing your soft date tasks in the context pages, so you can insert other tasks between them later.
When a page become too full, insert another page in front of the old page and keep going.