...cycle at 5 amps while others cycle at 6 amps.
Now you lost me there...
6 is the charge current and is quite reasonable for 3300 GP cells. And if it's what the matcher sugests and your charger is able to do it there's no big deal about it. If the numbers are right you can charge at 6 amps to get them.
The manipulation generally happens in average voltage sampling time of other stuff. 360sec cutoff, or room temperature or whatever.
I never saw anyone doubting the numbers due to the charge current...