trouble with Bank Recs

In my new role I recently began using MYOB and new to it although have some bookkeeping experience

I've been asked to reverse many incorrect recieve money transactions and make them recieve payments when matching via bank feeds. 

I'm now trying to reconcile bank ac which have not been done for a long time. 

It appears the reversal entries can be seen as well. is this usually the case?

I can mark these entries as cleared ransactions  (as they effectively balance eachother out)  as well as bank statement transactions. 

Some are duplicated and do not balance

How would you suggest I handle this? 

Thanks for any help you can offer.