Because the first action return the "document/uni work" folder to the input of the second action.
To create a folder action :
You must select the ‘Folder Action’ template (not Workflow) and press ‘Choose’ (to specify the folder).
Add "Copy Finder item" action.
Now simply select ‘Save’ from the File menu. Because this is a folder action, it wont ask you where to save the workflow – but simply ask you for a name for the action.