Watch the voltage during the last part of a normal peak charge to see if the voltage is dropping.
Not sure if it drops just before peaking, but I know the cells steadily climb up to around 1.41-1.43 volts each (or so my triton says) from the start of the charge untill peak. I have however noticed that after the triton stops charging the cell voltage drops back down some.
After you peak the pack, re-peak the entire pack together to see the voltage and the additional mah put in.
Not sure about the voltage, but when repeaking the entire pack at 5amps it takes in about another 300mah. Thats why I was doing each cell individually, to get the extra 200mah.
Your pack is probably out of balance...
Well thats what I was thinking too, but I individually discharged each cell then peaked the pack and its just the same thing, 2700mah.
You need to equalise the pack with an LRP equalising tray, it's great and only costs £17.50 and individually discharges each cell down to 0.7v
I already do that, the only difference is I use my charger (Triton, it can discharge too).