I have seen numerous threads on this question, but I'm still having issues with my implementation. Below is my workflow. I union a newly created variable with my data.

In the output file options I tell it to append the variable to the file name. I do not want this field outputted in the file itself, so I unchecked the box at the bottom:

For some reason, two files are created. Both have a unique issue. One of them is missing the data, the other one is missing the appended date in the file name:

Any idea where I'm going wrong here? I have attached the workflow as well.