Bank Feeds and Duplicate Transactions

Bank Feeds and Duplicate Transactions

I am new to Zoho Books.  I have set up in my Zoho Books account, my Business Checking, Business Savings, Personal Checking and Personal Savings accounts that I have with Bank of America.  The Feeds have downloaded my transactions and I have NOT entered anything manually. However,  I have several entries that are duplicates and say 'Manually Added'.  I have unreconciled accounts in order to uncategorize the entries to delete them, but they are still there.  I don't understand how they are there in the first place and I need to know how to delete them permanently.

1) Why are duplicates showing up from my bank feeds without me entering them?
2) How do I permanently delete these and prevent the erroneous duplicates from showing up in the future.
 
Thank you for any assistance that you can give.

Jamie