Always ending a tuning by tightening the string, while it might take a little longer, helps tuning your instrument and keep it in tune longer. This ensures you get the best sound out of your instrument.
Tuning in this fashion Roadie brings the string down below pitch then tightens it back up to the correct tuned pitch.
To activate/deactivate tuning up, navigate to "Tune Up" in "Settings" on your Roadie or in the Roadie Tuner app.
Press "Sync" to send the changes to your Roadie.