I suspect that's still within the error specification for the unit--and quite possibly the 0.2A would also be within it. Usually the error is plus or minus some percentage plus one (or two or three or however many) least significant digits.
A faulty shunt would not generally cause an offset like this; it would instead cause a more or less constant error by some factor (i.e. it would consistently read 10% more current, or less current) because of changes to the resistance of the shunt. (Bear in mind that a shunt is nothing more than a precision low-value resistor.)