The exit times follow from the employment and the fixed conditions of conduct of life under section 156b StVG.
Electronically monitored house arrest is not mere confinement to the home. Section 156b StVG assumes that the convicted person pursues suitable employment outside the fixed presence times. The exit times therefore follow primarily from work or training, plus the times set in the conditions of conduct of life for necessary errands and journeys. Outside these times there is a duty to be present in the home.
What to do now: First, coordinate your working hours precisely with NEUSTART and the institution so that the commute and duty hours are reflected in the conditions from the outset. Second, report changes such as new shifts or a change of job immediately rather than departing from the times on your own. Third, build in buffer time for the commute, because being late can be counted as a breach.