How to read the position of the decimal point with this multimeter?
The internal digital meter inside the multimeter is a 200 mV (0 to 199.9 mV) meter module. We know this because it is standard, popular specification and because the dial's most sensitive range is 200 mV DC.

For current measurement the meter needs to switch in a shunt that will drop 200 mV at the specified range current. From Ohm's Law we can work out the likely shunt resistor values.

Table 1. Shunt values.

Range      Shunt resistor
   2 mA    100 Ω
  20 mA     10 Ω
 200 mA      1 Ω
2000 mA      0.1 Ω
  10 A       0.01 Ω (gives 100 mV)


The readings are a little strange. 
The decimal point (which is switched by one contact of the selector switch) is in the correct place for each range but the current readings suggest that something isn't switching and that it is reading 0.22 on all.



Figure 1. A multimeter PCB showing the range selector contacts. Image source: Dismantle-It.

If it's not under warranty then open it up and check the wiping contacts are clean and touching the PCB.