I am having a similar problem with mine...... i set it to 10 amp discharge with a 6 cell GP3300 pack attached and it only discharges at 8 to 8.5 amps. but if i drop the discharge to 8amps it will discharge at 9.5 amps...... and it wont cut out either i had it say it discharged 15000mh+ out of a 6 cell GP3300 pack while i was at TCS and this was after a race too.....