Hyperion Charging question - mAh reading after charge

[JThiessen]

I've always been under the impression that charging is a matter of getting the voltage up to a packs maximum voltage. However, recent experiences with others have led me to think that maybe getting the mAh up is just as important. I've seen people recharge their packs until the charger showed that the mah were up to the rated capacity of the pack.
So that led to me actually paying attention to what my Hyperion Duo reads after the charge.
On my A123's, its been hit or miss. Sometimes it shows numbers between 4000 and 4600, but more often than not, they read about 1900-2100.
Today, with my first set of Lipos (Zippy 3S 4300's) that i purchased used from a member on here, they charged up to correct voltage, but they only read about 2K mAh, and 20 and 21 Ohms.
Should I be concerned?

I also attempted to sync charge the packs, the instructions state that you hold the enter and the down button to get sync mode, but it did nothing. Any tips on that?