publishing script not moving staging/${JOB_NAME}.next to staging.previous/${JOB_NAME}

In hudson@dev01:~/STATIC/jbds/builds/staging, we see a lot of *.next folders. These should be moved as follows:

rm -fr ~/STATIC/jbds/builds/staging.previous/${JOB_NAME}
mv ~/STATIC/jbds/builds/staging/${JOB_NAME} ~/STATIC/jbds/builds/staging.previous/${JOB_NAME}
mv ~/STATIC/jbds/builds/staging/${JOB_NAME}.next ~/STATIC/jbds/builds/staging/${JOB_NAME}