`quota-report` reports incorrect `scratch` usage

The usage value for /scratch/$USER/ in the quota-report command is inaccurate.

We claim that it reports usage under /scratch/$USER, but what it actually reports is total file size of files owned by $USER in all of /scratch/. These files are not necessarily in /scratch/$USER.

Example:

Suppose Matt and I both have rwx to a shared directory. Matt creates a file. I can then mv the file to my /scratch/$USER/ directory and increase Matt's reported usage.