So confused... chain of command?

Hey guys,
So I am in CNA class and studying for my test and totally confused about chain of command. I've asked other classmates but we can't seem to agree and unfortunately I forgot to bring it up with my instructor today.

I'm particularly having trouble understanding if a "patient care manager" is the same as the "nurse manager" for a department.

Also, is the "charge nurse" just in charge for the shift they are on?

What is the difference between a DON and a nurse manager?

And the DON reports to the nursing administrator or is there just one administrator over the entire LTC facility? ARRRGHHH!!!

These titles are super confusing for me... I've got all my A&P and disease processes down pat, it's intuitive, but this organizational stuff ties my brain in knots. ScheduleSchedule
DONNursing supervisor (not every hospital has these)Nurse managerCharge nurseRNCNA (can also report directly to charge RN depending on issue)

Quote from Lev <3DONNursing supervisor (not every hospital has these)Nurse managerCharge nurseRNCNA (can also report directly to charge RN depending on issue)

DONs and nursing supervisors are part of nursing admin. The Chief Nursing Officer (CNO) is above the DON (director of nursing). There can be more than one DON One may be in charge of the critical care units, one may be in charge of acute care units, and one may be in charge of the ED. The CNO, in addition to nursing, can also be on top of directors of departments such as dietary, respiratory therapy, environmental services etc.

Part of the confusion is that not every facility as the exact same positions. For example, the first place I worked in as a CNA had an ADON (A=assistant), a DON for LTC, and a VP of Nursing Services (the facility was a nursing home and critical access hospital in one building--the VP was over the whole place; the ADON and DON were for LTC only.) Where I work now, each unit has a manager, above them is middle management--in my case a "director for critical care"--and then the CNO. I'm particularly having trouble understanding if a "patient care manager" is the same as the "nurse manager" for a department.

The hospital I used to work at had a patient care manager. She was kind of like a bed-coordinator, managing the flow of patients between departments (a small hospital with OR/PACU, OB, ED MSCU, and ICU). She also followed up with MSCU/ICU inpatients and discharges to see how they are doing, answer questions, etc (gotta improve those patient satisfaction scores!!). I'm pretty sure she took over the nurse/CNA scheduling for the MSCU/ICU as well. Her position was in between a nurse manager and charge nurse. She didn't take a patient assignment, but would help out if needed (part of RRT and code team).