Refrigerant split problem

Hi people,
I am dealing with a fin and tube heat exchanger model of a condenser R134a.

I would like to know the following:
- is it possible that mass flow rate in the upper circuit differentiates from mass flow rate in bottom circuit?
- are split temperatures of refrigerant in both upper and lower circuit stays the same?
- are combining temperature of refrigerant an average of both refrigerant temperatures into the combining point? (I am thinking they can be different, in opposition to split refrigerant temperatures?

Note: Although length of tubes in both circuits stays the same, the arrangement isn't the same (symmetric)

Thanks in advance,
lukezo