Are fibromyalgia and chronic fatigue syndrome the same thing? ?

Some researchers believe fibromyalgia and ME/CFS may be the same illness at opposite ends of the spectrum; fibromyalgia has pain as the main complaint, with fatigue being second, and ME/CFS has fatigue as the main complaint with pain being second. Both illnesses involve a malfunction of the HPA axis (Hypothalamus-Pituitary-Adrenal) as well as the central nervous system, and both have numerous overlapping conditions. It is not unusual for a person to be diagnosed with ME/CFS and later receive a diagnosis of Fibromyalgia, or vice versa.

While there are many similarities, there are also a number of differences between the two illnesses, such as:

Fibromyalgia has generally not been connected with viral and bacterial infections (with a few exceptions, such as mycoplasma and parvovirus B19)

CFS/ME has occurred in epidemics, but none have been reported for fibromyalgia

Fibromyalgia is not thought to ever be progressive or life-threatening (as CFS/ME can be in rare cases)

Fibromyalgia does not usually cause severe immune dysfunction, neurological symptoms and exercise intolerance

CFS/ME usually does not cause allodynia (exaggerated response to pain: non-painful stimuli experienced as painful)

Diagnosis of fibromyalgia requires tender points (painful areas in the muscle that occur in certain places)

No.

Chronic Fatigue Syndrome is also called ME in the UK. I have no idea why Fibromyalgia and ME are lumped together.

maybe-
but right now
CFIDS is considered to be autoimmune and FMS neurological

No.
Although CFS has often muscular pains.