First, I don't know a thing about this charger. So this is just an opinion. On the discharge setting the 0.90v is the voltage the charger discharges them to. The current setting is the rate of discharge. On the charge side, the condition is where the battery is charged and the voltage starts going back down. In this case when the voltage goes down 8mv the charge stops and the battery is full. The current is the charge rate. Again, I don't know this to be facts but I think that's what you have going on.

I'd charge the 2000mah one at 2 amps and the700 mah at .5 mp. That's conservative numbers. You can discharge them at about the same rates.