The duplicate transactions in the bank feed are typically a result on not "matching" transactions properly. An Accountant such as myself can easily help you fix this historical problem. My approach involves auditing the duplicate transactions, pushing back into the bank feed the transaction that should have been originally "matched" as opposed to directly "added". Sometimes the duplicates are the result of "adding" deposits directly within the bank feed as opposed to correctly "creating" deposits to "match" bank feed deposits as they come into the bank feed each day. These are common errors that I correct for clients daily.