35 minutes sounds about right, a new pack is typically about half charged, or what's called storage charge. It might take up to around an hour or slightly more to charge if ran down most of the way. FYI, don't fully discharge a lipo.

As long as the charger is set on lipo mode correctly, the charger will take care of the volts. They should rise up to 4.2V per cell, 8.4V total for your 2S pack, then the amps will drop off as it holds the voltage to top off the pack.

Personally I wouldn't take the time to charge at a lower amperage, modern lipos can easily handle a ~1C charge rate without issue.