Yes, they do get more wage
I think the salary is the same for everyone except the manager
The team leader made 50cents more but the supervisor made only a dollar more. You did have to put in a lot more work and responsibilities.
Nope, supervisors don't get extra
It depends on the store. Our supervisors made about 50 cents more than minimum wage. We did not have team leaders. I heard that some stores paid the staff that worked in the back more, but our store did not. The staff in the back was paid minimum wage with no tips while the staff in front did make tips.
Staff are all paid differently including the supervisors.