網上匯豐銀行check數 NET BACK ITEMS 5,699.60 係點解????

It did not show all the transactions during that period anymore. It just showed you the net amount, i.e. Withdrawal is more than deposit.
For example: Day 1, you take $100, Day 2 $200, Day 3 deposit $50
Net back Items

-100-200+50 = Net back Items -$250

2008-02-12 03:11:35 補充：
好久不打簿, D數不再show出來.會用Net Back Item代替。舉例： Feb 1 取＄１００，　Feb 2 取＄２００，　Feb 3 存＄５０Feb 1 至 Feb 3 的Net Back Items:-100-200+50 = Net back Items -$250 在支帳一欄會有＄２５０扣左

因為你太多 transaction，如果你一路冇打簿，佢就會將所有 transaction 夾埋一條數 show 比你。

2008-02-12 09:01:25 補充：
如果交易少，就算好久不打簿, 都唔會出Net Back Item。要有 28 個交易或以上時 及 到星期六先會出Net Back Item。

your remaining value.