Lipo charging Volts setting

[millzy]

Hi lads

final got a new lipo charger and im about to charger my brothers cells

now on the lipo pack it says 20c 7.4v
on the back it says abourt charging at 1c and thats all simple enough
but then it says the charger setting should be set 2 cells and 8.4 volts should vbe used

so what do a put the volts setting at 7.4v as it says on the pack

or 8.4v as it says on the back of the lipo instructions

Im not naming the pack as i dont run for this company- but Cragg and Bradders run for them and its a 5000 stick pack