Labs show serum albumin 3.9 (ref. Range 3.5-5.5)and globulin at 1.9 range (1.5-4.5) but says total serum protein low at 5.8 range (6.0-8.5) what gives?

Probably nothing. Total protein consists of the sum of the globulin proteins and albumin. Since the individual values for globulin and Albumin are normal, it is questionable that there is anything wrong. This may just be normal for you.