Hyperion DUO owners, need help

I've charge my both pack in same time tonight, and i've remark than during charging, on the chanel 2, the current display is realy not stable. Mycurrent was set to 2.5A, and the display always swing between 2.41 to 2.53.
On the chanel 1, the current display is realy more stable, play between 2.49 to 2.51.

And another proble, when the charging process is ended, and the display show "CC/CV END", on the chanel 2, the current show 0.00A, but on chanel 1, the current show 0.62A, and the charge was ended

Could you tell me if you experiment the same thing on your's please??

Thank you