Current shown on power supply about 1.8A? What voltage shown on power supply? What voltage is power supply set to (i.e. what is shown when disconnected from battery?)
When power supply displays lower voltage than its setting, expect amps = setting.
When power supply displays amps lower than its setting, expect volts = setting.
If power supply is set to 3.4V, that is low on knee of the curve. Not much balancing.
If set to 3.65V that would be high on the curve. Current should remain high longer, and balancing will be much closer.
If supply is set to 3.4V, displays 3.29V, and current is low, that seems odd.
But possibly the missing 0.11V is a drop inside the power supply, regulation is happening at one point and meter is reading another.
I would disconnect battery, set supply to 3.65V, reconnect battery. Then observe readings.