CHARGING CURRENT is too low ?

Hi, 

I am using BQ24735, BQ40z50 combination to charge and monitor battery of 2200mAh of 0-4.2V ( 3.7V )

I desgined Battery capacity - 2200mAh, Voltage - 14800mV, standard low charge current - 1024mA and High current to 1500mA.

It is showing Full charge capacity as 2163mAh why ?

After 80% it takes very much less current to charge, i.e.. 100mA gradually decreases for 89% it is taking 27mA to charge. (It takes so much time to charge in this current). So please suggest me, how to solve this problem.