If you're in a specific work center and that work center TL gave you some tasks to complete and another TL from a different workcenter gives you different tasks, you're supposed to always adhere to your workcenter TL, same for the ETL, if they override the TL's orders, you need to go to your work center specific ETL because they are the ones that have their work center's best interest in mind(ideally). The TL and ETL have to defend their TMs so they can get their tasks completed.