So there have been some changes made to the explorer:
1) It now parses in the transaction ref_height. The balances now are much more accurate. The API (http://freicoin.info/chain/Freicoin/q/addressbalance/1KQ...) so far appears to be exact. The balance calculated in the tables appears to suffer some round off error for address with many transactions.
2) The redeemed transaction value is shown at the time it was redeemed
3) Cumulative demurrage is calculated
You should go to your wallets and type "listaddressgroupings" and compare the balance for each address with Freicoin.i